Gmt400 speed sensor. It also helps detect slip in the engine and transmission I believe right at the front of the transmission where the output Hey, so, I have a 93 GMC K2500 Suburban. mightydemon94 MPH/km/h - Vehicle speed is a PCM internal parameter. 1 is in the dumpyard already, as I got a carbureted 7. GMT400 Contact us; Speed sensor replacment. The synchros are getting worn out, and 2nd is particularly bad. It took a few tries but it's within . Swap in a known-good PCM, 3rd gear starts, can manually shift through all gears. 4l 20 Like the title says, I'm looking to swap from a 60E to an 80E in my red '97 C1500. This solved a check engine light, limp mode, and high idle for me. 1” The "speed" of the O2 sensor probably has more to do with it's age and mileage than with the brand. Miscellaneous PCM inputs - In addition to the various sensors, the speed sensor. 51 - $518. I’ve replaced the speed sensor on the transmission which apparently is the This thread will provide detailed instructions for those with a 1992-1998 Gm pickup truck, with either 2wd or 4wd who wish to recalibrate there VSSB(vehicle speed sensor Buffer). 1997 k1500- 5. I am almost down with installing my dakota gauges in my 89 with 5. This one was substantially built as well. I have shortie headers and the current stock O2 sensor is installed in the left side header. Interesting. The sensor is like an open circuit and produces no voltage, when it is below about 360 degrees C, 600 degreeF. It wasn't until the gmt800s that the pcm fed the temp info to the cluster. Put in a I'll show you how to make a wiring harness and replace VSS wiring harness. Finally in 1999 they migrated to the 4. I was getting MAF and cam sensor codes. Reactions: GrimsterGMC, movietvet and I am almost down with installing my dakota gauges in my 89 with 5. Yes, I really want to do this. ) Is it possible to put in an evo bypass without removing the pump. I am stuck on the speedometer sensor part. 7 gas, dually cab and chassis, 5 speed manual. I've done the ABS bleed with it; no luck. Regardless, follow your instructions for 4L80 4x4 swaps - for 96, I would think they would have you use the T-case speed sensor location and the 4L80E's input speed sensor. Options. If its a wheel speed sensor then the hub bearing assembly needs to be replaced. Well, I should perhaps give my point of reference. Question regarding A/C condenser fan/fan relay: ever since I purchased this rig, I've noticed the condenser fan only kicks on when temperatures outside and in the engine bay are super hot. Not sure where the differences start & stop. process should be more or less the same for you, roughly in this order. Been lurking a while but never posted. Test description: 1. Checked circuit and sure enough, contacts on fuse were corroded. I got true dual exhaust installed but the vendor didn't install a bung plug for the sensor. It is located on the tires (near the brake rotors for the front tires and in the rear end housing for the rear tires). Hi everyone! I'm back asking for help from you gurus. I wanted to keep some functions though that need the ecm. The issue is I don’t think it’s stick by searching the interwebs for a new My speedo is lurching when I engage cruise or accelerate harder. 700r4 speed sensor question. Its not available in the GMT400 Now, if you mean the auto engaging 4x4 NV243 t-case, again it doesnt have a viscous coupler and locks the speed of the front and rear 5 speed swap. The system is actually very simple. But do I also need a new speed sensor or gps tracking thing? I saw someone mention that . If it is shifting normally it is not likely the speed sensor. The vehicle speed sensor reluctor wheel is splined to the transfer case main shaft. Currently battling a hard start / rough idle when warm. 91, Chevy, K1500, 4wd. Feb 1, 2012 #6 badazzbulldog I'm Awesome. Anyway, you may have a bad ground or solder joints on the PCB. Check Details The wheel sensor stops reading rotation because of crub build up on the sensor or rusting under the mounting surface. but it is very similar (if not identical) for most all GMT400 trucks. Search. Joined Mar 1, 2012 GMT400 Contact us; Did some research here but really didn't find what I needed. The I used a 98 5 speed with the internal slave. Speed Sensor (VSS) dropoff w/ Hi-stall converter. I'm willing to bypass the sensor, but would I need to use a 96 pressure hose? Do you think the 97 pressure hose would fit back there? The computer also has a voltage reference, delivered through one of the fuses. I have isolated an ABS problem to a front wheel speed sensor. VSSB is Vehicle Speed Sensor Buffer (TBI VSSB, GM VSSB, Speedometer Buffer) DRAC/VSSB Module Year/Make/Model Applications. 75 or OEM 6×5. you will either need to cut and paste your existing driveshaft's or get driveshaft's from a similar year/model from a gmt400 I still pulled a loaded trailer with truck and trailer weighing just over 1400Lbs at a max speed of 80 mph on I20 near Pecos Hello everyone. Permalink; History; Subscribe; Your Tahoe has two, a Transmission Input speed sensor and a Vehicle Speed sensor (not including the ABS speed sensors). GMT400 Forever! Joined Mar 21, 2015 Messages 2,015 Reaction score 3,188 . I was going to change the o2 sensor and noticed the wire had been cut and crimped to a red wire instead of to any kind of factory harness. Your Tahoe has two, a Transmission Input speed sensor and a Vehicle Speed sensor (not including the ABS speed sensors). A dash equipped with a gauge is a single wire canister type with one wire. This thread will provide detailed instructions for those with a 1992-1998 Gm pickup truck, with either 2wd or 4wd who wish to recalibrate there VSSB(vehicle speed sensor Buffer). Is the a way to fool the system and make it think the O2 sensors are still there. Otherwise I'll probably just swap the steering speed sensor. i figure if i buy a whole truck i will have everything i need like the steering column and so on and so forth this is nothing I'm going to do right off CLAMP TYPE SPEEDO SENSOR FOR GM 4X2 NV4500 5 SPEED MANUAL TRANSMISSION QU10227. Rep: 1. 5 volts AC at 100 RPM to more than 100 volts AC at 8000 RPM. 4 Vortec, 4L80E, 4. Not in '88. 400 is a good Hello anyone have a or know where to get a new front wheel speed sensors 93 sub 4x4 2500 can't find them, 2 bolt tie them just below the spindles. The IC processes the VSS signal, sending it to the cruise control, ABS, speedometer, odometer, and the vehicle computer for use in computing fuel and spark needs. 5td 4L80E It is also noted to check the reluctor wheel by removing the sensor from the transmission (4x2) or Transfer case (4x4) and using a flat tipped screwdriver and try to rotate the reluctor wheel. Speed sensor replacment. Supporting Member. Just note your choices of tires size, differential ratio, A/C or not, Tach signal, Emissions, VATs delete, transmission type, two electrical cooling fans can be enabled thru the new PCM, etc. 7L L31. Thanks very much! It only does it about once a week, but makes it almost impossible to drive. been working on swapping a nv4500 5 speed into my 1997 k3500. An open sensor circuit, or a cold sensor, causes Open Loop operation. I’ve got the egr and knock sensor listed for the manual transmission , I found just the opposite. the wiring harness for the 2wd is extended to the rear vss on the transfer case , the Vehicle Speed Sensor Adapter just hooks the 2 wiring harnesses together . 7”closest to that is 205-75-15 at 27. To determine the location of either, the Looked it up on the internet and find that all this could possibly be caused by speed sensor. It was one two wired connector under the driver side dash that had a little corrosion on it, cleaned it with PB blaster and trans shifts perfectly in all gears, speedo works and heater works again. Take a look at our new tech video highlighting the 4L60E input speed sensor and other tips to help you at the workbench. Replies 21 Views 2K. Everything I tested seemed to be good. Button @richardgbutton. As time went by, it set at lower and lower speed. Joined Jul 9, 2019 Transmission shifted to reverse while traveling highway speed. 1994 seemed to be the year model that GMT400's went to the temp sender style on the head that has an oval socket that looks like the 2-pin connector for the temp sensor on the intake, but only has 1 pin populated. if something is awry then they won't work. Click or call 800. At that time I used "TTS Datamaster $0D" for data logging (using a NB O2) and visual interpretation of the data, then I tweaked the VE tables in an Excel spreadsheet and transferred them to TunerCat, then download into a ROM emulator. I have ordered the GM AFS74 heated oxygen sensor and harness and I'm debating on LoL reminds of my first ever experience with my MT2500 on our former '88 C3500. 0 truck to the rest of the exhaust. I also tried Sorry for the short video I'm gonna try and be more like myself and try to make the videos more entertaining. 7 Vortec. 43: 1988 Chevrolet K1500 V8-5. The last time I tuned the VE tables it was ~20yrs ago on my S10 V8 conversion. If you click them and make a purchase, we may earn a IMPORTANT: The sensor resistance is model dependent and varies with speed from a minimum of 0. The job of the wheel speed sensor is to constantly monitor and report the rotational speed of each tire to the ABS control module. That tells me that the issue is with the VSS or the connection from the VSS to the ECM. New posts Latest activity. 315-35-17 are 27. Reactions: 94burbk1500. With over 80,000 products backed by a team of product engineers and experts based in the United States, Dorman is the first choice of automotive professionals, backyard The 0727 says low or no engine speed sensor input. Jul 14, 2024. Thread starter roy c; Start date Nov 14, 2015; Knock sensor wasn't connected, coolant sensor wasn't connected. The 350 was swapped in, as was the 700R4. Cruise control, speed sensitive steering, IP panelgauges I did unknowingly strip out the crank position sensor and that left me with non-functioning AC. I only have This ONE SENSOR Easily FIXED My ABS System! No More ABS Light!! #ABSLight #ABSRepair #AntiLockBrakes*** I am an Amazon associate. Adding a speed sensor tone ring / Reluctor ring to 4l80e for 4wd to 2wd conversion. i have a 95 c1500 TBI, I installed a 96-00 crate engine so I have vortec heads. Thread starter big bird; Start date Jun 28, 2024; Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. Changing this value to be, e. The abs sensors located near the wheels don’t send speed to the dash. Purple is high speed from what I can tell and yellow is low speed. I used a y pipe from a 5. com FREE DELIVERY possible on eligible purchases I have a 93 k1500 4x4 4. No Power to Speedometer? 1992 C1500 with the 700R4 here. 7, the previous owner halfway ripped the exhaust off the truck with a stump so I removed the rest of it and built my own. 4WD Units - eliminated the rear speed sensor reluctor gear on the on the output carrier assembly in many 4WD units; 95-96 may or may not have speed sensors installed but if so, they are non-functional Speed Sensor Conectors? Thread starter Zseventy-one; Start date Jul 29, 2021; Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. I had the EVO on my 1998 Suburban. So I've had an intermittently working speedometer, most days it's just totally dead no matter what Sometimes just cleaning it up will fix the problem. Chevrolet sold the Custom C-1500 with inline 6 engine and a 4 speed manual until 1998 model year. So if the scanner shows your speed but the cluster doesn't, the cluster has issues. Most cars show wrong readings-usually 5 mph more than real speed. Check Details. And I’ve noticed the brake light goes away when when everything is working fine then when the sensor stops detecting the light turns back on. 663. As with most speed sensors, it is measuring a tone ring, and unless I am mistaken, it is a digital signal consisting of a high and low. 7L & 95-00 Chevy Tahoe & GMC Yukon 5. 7L-Front Right: Speed Sensors - Amazon. I mean the 5. it could be something as simple as low fluid, a wheel speed sensor, a fluid sensor, or air in the brakelines. @someotherguy has done some write-ups on these. It COULD give the code you mentioned (if far enough out), but in this case, it didn't Go to GMT400 r/GMT400. Replace Your Chevy or GM Power Steering Pump | AxleAddict. Check wiring, check other sensors such as Speed Sensor (VSS) andThrottlePosition Sensor (TPS). GMT400 Contact us; I have a 93 k1500 4x4 4. Sep 5, 2017 #1 M. I've adjusted my rear brakes; no luck. New posts Search forums. Use this subreddit to post pictures of your GMT400 trucks, show us I have already replaced the speed sensor on the transfer case, but that's as far as I have gotten. junkyardjack; Jul 13, 2024; Axles + Brakes; Replies 4 Views 537. 1989 C1500 5. I'm wondering if that sensor is causing the high ACDelco GM Original Equipment 15547452 Vehicle Speed Sensor So I just ordered another knock sensor from the same Amazon AC Delco store because nobody locally can get one to satiate my impatience afaik, didn't want to wait for Summit and I Speed sensor problem, help. Sensor on back of engine coming off a 90 degree fitting, oil pressure? Truck is 94' Yukon, TBI. check the fluid level, if that is good you need to see if the ABS is ACTUALLY working. this truck will be getting a low mile vortec motor (5. This should be done when gearing ratio 1. 3L V6 with 5 speed manual transmission for the base models for the GMT-800 platform. The gist is that you can easily set the EGR parameters so that it's never enabled (e. From a certain perspective, that fuse is a "sensor" of voltage. Sort by: The purple and yellow twisted pair wires that use a magneto pickup from the factory 2wd 700r4 are still there. Long story short, the stock 4. So far I’ve put about 6K miles on it , this has been with the ecm from the auto still installed . I’m only running one flexalite fan with a 195/175 sensor. Jan 15, 2021 #6 kennythewelder Officially Retired, B31-3 (6-G) certified welder. The previous owner removed the entire factory exhaust system and replaced it with a custom dual exhaust system. 82 Questions View all . , set the "enable" coolant threshold to 275F). both front ABS speed sensors the cable going to them was damaged in a few I scanned with my OBD2 reader and it said bad speed sensor left front. I am pretty sure I am at full boost all of the time and I'm actually seeing some end play in my steering gear output shaft as well as leaks around the EVO. Richard G. That as well, can be done via LT1swap. GMT400 Forever! Joined Mar 21, 2015 Messages 2,015 Reaction score 3,188 Speed sensor in tail shaft of 5 speed manual transmission. Sep 14, 2012 #8 bow61509 GMT400 Thug Life!! Joined Dec 7, 2010 Messages 9,310 GMT400 Forever! Joined Mar 21, 2015 Messages 1,999 Reaction score 3,159 Location all the moonie clusters have the vehicle speed sensor stuff done IN the cluster, whereas starting in 96, the VSS runs to the PCM directly. Skip to main content. ** Failure to install a pump with a matching input shaft or pump not compatible with a turbine speed sensor into a 4L60E-equipped vehicle that originally came w/one will result in no upshift from first gear No. May 31, 2024 #6 someotherguy Even more awesome in person. You'd have a fun time trying to get that to work, much less everything else. Have crank position sensor, fuel pump, distributor cap, rotor, coil pack, pressure gage. Latest posts. When doing so he removed the cats and and the O2 sensors. However, I am up in Canada with a lot cooler temps than down south. and that is the truck I have, old 4. But I'm not used to seeing 800 seconds (13+ minutes) worth of cross-counts on one display. I have been transformed from an The 0727 says low or no engine speed sensor input. I have a Snap-On MT2500 with the ABS cartridge. Power steering sensor speed evo pump gmt400 replacing gm truck behind inside there small Replacing power steering speed sensor Steering chevy 1998 power pump k1500 control solenoid plug electrical back assist hi Power steering pump for gmc chevrolet silverado 1500 96-07 4. On my '88, the signal from the VSS goes to the instrument cluster. Unplugging the sensor for diagnostic purposes is fine but I certainly don't recommend driving like that. Replacing Power Steering Speed Sensor | GMT400 - The Ultimate 88-98 GM. They are the same part, the output is the one A wheel speed sensor, also called an "ABS sensor," is part of the Anti-lock Brake System (ABS). Jul 5, 2024 #4 GoToGuy I'm Awesome. Hence I check the speeds on the maps. com 1998 C1500 & 1997 K1500 BURB. I have a 1998 k1500 Silverado that has the 5. I get a CEL code 24 when it doesn't work. I replaced the VSS (Better know in the 411 gauge cluster instrument cluster k1500 mph rpm speed sensor vss wiring help Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. autoaccessoriesgarage. Plug #824 sends vehicle speed to speedo: (4000 ppm signal) - Light blue / black wire Plug #437 sends vehicle speed to PCM: (signal unknown) - brown wire Plug #821 (purple/white) vehicle speed input from VSS sensor (green/black) - 128,000ppm input signal to VSSB (one of #821/#822 is a low high SINEWAVE signal) Plug #250 12 volt ignition - brown wire The speed not only reads faster than it should, but it reads faster and faster the more I pick up speed. 1-406-384-0270; Call Us 1 Push-In type speedometer Sensor first appeared in 1992 and it was used until early 2002 in C-Series GM trucks with the GMT400 body. Yes, it's a V6. Joined Sep 5, 2010 Messages 8,519 Reaction score GMT400 Contact us; Terms and rules; 90 k1500 5speed I am sure somewhere some has posted or asked about this if so please tag a link for it. I would at least check the ohms of the sensor and the reference voltage going to it with a multimeter. For more information, make sure to s First on low speed with the motors in series for 6 volts each. Post pictures of the speed sensor-side as well as the cooler line fitting side of your 4L80E here. The Speedometer Sensor is grooved for an o-ring and it is installed by I started driving with phone speedo(an app or google maps will show you accurate readings) and learnt which speed is where-30 is 35, 40 at 46-47, 50 at 60 and 70 at 83-it goes gradually up. it was the distributor housing positioning (relative to crank sensor). Then on high speed with the fans in parallel and 12 volts each. 7L: Service type Wheel Speed Sensor - Driver Side Rear Replacement: Estimate $299. Standard ceramic finish is polished silver; contact the company for bare steel Road Trip, thanks! '98 Chevy 3500 5. GMT400 Forever! Joined Mar 21, 2015 Messages 1,999 Reaction score 3,159 Location all the moonie clusters have the vehicle speed sensor stuff done IN the cluster, whereas starting in 96, the VSS runs to the PCM directly. Thread starter spitfirespl; Start date Nov 17, 2013; Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. A failure in the wire harness is often mistaken for a failure of the associated sensor or output On the 97 and newer there was an EVO sensor attached to the power steering pump. Sometimes it's the ABS unit itself. But only sometimes any ideas? 93 Silverado c3500 6. Since the 4l60e is a computerized transmission, I did have to send my computer to black bear performance for a pcm reprogram. And then after a 10-minute wait pulled the stock ECM used Jeffs's fantastic wiring diagram and 0411 ECM he programmed for me with my tire size and I've discussed "EGR disable" in another thread on GMT400, somewhere (I'll look). It takes the single signal from the Vehicle Speed Sensor (VSS) on the transmission and creates two new signals based on the hard-wired jumpers inside the VSSB: one signal for Replaced with new AC Delco sensor and can now hear a whining sound with window down over 25 MPH. , 135MPH, effectively disables the EGR. 98' Chevy k2500 HD 5. 7) is slowly but surely dying. 87: 1989 Chevrolet K1500 V8-5. Get app That will tell you if the speed sensor is outputting data to the ecm or not. I've replaced the plugs (ac delco coppers), o2 sensor (ngk), egr valve (delphi - old one was completely shot) and associated hoses/lines. will be used mostly for towing, hauling, and when i It read 4 MPH high at every speed. If it is the same as the 700R4 (also originally a cable) you can swap tail shaft housings and add a reluctor wheel to the output shaft as well as the speed sensor. Apr 20, 2012 #5 Wildbill0088 haulin' the east coast. Buy MOCA ABS Wheel Speed Sensor for 95-99 Chevy K1500 & GMC K1500 5. Joined Mar 2, 2022 Messages Go to GMT400 r/GMT400. 1998 Chevy Silverado Power Steering Pump Diagram - Hanenhuusholli. Google says the engine speed sensor is on the top of the bellhousing. 5 or 6-Speed Pro Fit Transmission kits. (squeezed a GMT400 reservoir between the fan shroud and a/c At freeway speed say 70 the engine will have a quick “ millisecond” misfire. Sep 14, 2012 #8 bow61509 GMT400 Thug Life!! Joined Dec 7, 2010 Messages 9,310 P0336 crank sensor code. Since the swap, I've replaced the maf sensor, crankshaft/camshaft position sensor, knock sensor, distributor cap/rotor, spark plug wires, and spark plugs. Attachments. The speed sensor contains a coil that gives off a continuous magnetic field. More diagnosis needed. About a year ago the cel started coming on & I could not retrieve any codes. 7 tbi, has a rattle under the hood under light load only. Syxxes Performance is dedicated to everything power-sport related, from installs, vlogs, 1990 1500, 350 TBI, I have been tracking down multiple problems on my truck just to get it in decent running shape in preparation for the 5 speed swap I'm doing. To determine the location of either, the engine size would C0503 is for ABS, specifically the front left wheel speed sensor. Has NOTHING to do with power steering/EVO/PS pump. also the adapter harness appears to go somewhere into a big harness , reality is it just goes into the The sensor on the intake is for the pcm, the one in the head feeds the gauge as you thought. Code had further details which stated issue could be sensor or circuit. If you click them and make a purchase, we may earn a small commission. Here's how to replace the speed sensor We cover the top problems of the GMT400 pick-up truck including door handles, the ABS brake system, and the fuel pumps. Unplugged it, fuse is good now, truck it is running great- codes didn't come back. com. LF and RF wheel speed sensor problems can be the sensor, the tone ring/hub assembly, or the harness. 3L V6 blew up its second 4L60E today. Close Search. Reactions: SUBURBAN5 and 93chevyluvr. The sensor you’re looking for is located on the back of the tail housing on the tranny on the drivers side. RWAL--Rear Wheel Anti-Lock only. 10s) and has been my daily driver for nearly four years now. One sensor with a single wire under the passenger side exhaust manifold, Knock sensor? One just above the drivers side manifold, temp sensor for ECM? I think the sensor on top next to the thermostat housing is the temp sensor for the gauge. Uses the speed sensor in the tailshaft of the trans (2WD) or in the transfer case (4WD. If the odo is off the same amount the computer can be reprogrammed. 33 - $490. I replaced the engine in late September of last year and have only put about 12,000 miles on it so far. front wheel sensor. 7L: Service type Wheel Speed Sensor - Passenger i would really like to have a 5-speed in my truck I've always wanted a ext cab 5-speed in my truck i was just wondering if i bought a rusted out truck between 96-98 with the 4. com GMT400 Thug Life!! Joined Dec 7, 2010 Messages 9,310 Reaction score 169 Location Texas. If you are using an automatic 4L60e that comes with it, the speed sensor is high resolution and goes into the PCM. So I So I have this 1995 k1500 that I recently bought that needs a transmision. g. Here's a pin-out diagram for the transmission wiring harness-case connector assembly. if you can move it then the reluctor wheel has come loose and is I was afraid you were going to say that. Clean the sensor, clean the rust off the bearning where the senor mounts, apply some grease on the sensor and reassemble. Thanks for the help. The problem is fixed and it was as simple as it can get. 19: Shop/Dealer Price $354. Prev. 1 - set it up for calibration, drive at a known speed and hit the button to set it. EVO sensor problem? KCusick81; Sep 22, 2024; Audio + Electronics; 2 3. VSS: VEHICLE SPEED SENSOR WIDEBAND O2: AN OXYGEN SENSOR CAPABLE OF READING RICHER FUEL MIXTURES THAN NORMAL O2 SENSORS WOT: These older GMT400s (88-91) have an adapter, similar to the newer DRAC or VSSB, on the back of the cluster which converts the 2000 PPM (Pulses Per Mile), from the VSS (Vehicle Speed Sensor) and feeds the speedometer and the ECM. The 5 speed manual in my 1989 chevy c1500 sport (tbi 5. It runs ok , but it’s not great. It would require a tune, but that pcm does have the ability to run an electric fan as there was an optional auxiliary fan available. Find out their symptoms, causes, and fixes with these tips from our expert mechanics. Speed sensor and digital dash didn't com well, so I swapped it with a gps speedometer. Rosta harness assembly 34446AK will service all years from 1991-2003. cut off the main power at the battery I always run a disconnect. I only have Wondering if anyone experienced can provide help on a power steering pump for a 97 Sierra 1500 4. This vehicle speed sensor is designed to match the fit and function of the original sensor on specified vehicles, and is engineered for durability and reliable performance. One day, I got angry. 1998_K1500_Sub. The vehicle speed sensor (or transmission output speed sensor) controls shift points and calculates the TCC slip. The crud build up makes it hard for the sensor to read the tone wheel and rusting on the mounting surface can cause the air gap to open up too much. GMC Suburban C1500 Power Steering Pressure Switch | GMC Suburban C1500. Replies 29 Views 906. Use this subreddit to post pictures of your GMT400 trucks, show us your mods, or ask for advice. Joined Oct 13, 2010 Messages 2,973 Reaction score 89 Location GMT400 Contact us; Terms and rules; vehicle speed sensor. Now trying to figure out the O2 sensor situation so I can get that sorted and better start to rule things out. I remember having this whining sound Vehicle Speed Sensor (VSS) - The vehicle speed sensor provides information to the ECM/PCM to indicate vehicle speed. Im wondering if my issue is a speed sensor along with needing to calibrate for my bigger tires? the same issue occured with factory recommended tire size. Want to get the full potential out of your GMT 400 Truck? At Auto Accessories Garage we have all the top name brand accessories at rock bottom prices. please note this is off the top of my head, not super detailed, and leaves out You can see the speed sensor in the first picture on this page: 4L80E Performance Transmission from PATC ,4L80E The hardest part of this was getting access to the bolt, but even that was just a few minutes of fiddling. 1992-1995 Chevy GMC Truck C/K 1500, 2500, 3500, 3500HD TBI gas (6,8 cylinders) Speed sensor in tail shaft of 5 speed manual transmission. Sorry. gmt400. Its a 4l60e and slips in reverse. Sep 21, 2018 #6 454cid Sooper Pooper. Any help or direction would be great. 0 Engine Performance + Maintenance Speed sensor and digital dash didn't com well, so I swapped it with a gps speedometer. 1987; 1987 GM RV Light Truck Wiring Manual with early release 1988 CK wiring diagrams. Thread starter Dustin Gilliam; Start date Jun 22, The transmission from the road master uses the sensor with the plastic gears to measure speed and the one in the truck originally used the sensor with a Probably some bad solder joints inside the cluster. Previous owner hacked the dash harness when they installed a Dakota Digital dash this is a message to all the smart dudes out there, especially when it comes to exhaust. 36. Stabbed it in, no change. The 0700 says general transmission fault and turns on the CES light. The O2 sensor varies the voltage within a range of about one volt, if the exhaust is rich, down thru about . When car has been turned off for a bit, then back on it will run normally. Check Details Check Details. In all cases--sensors and outputs--the associated wire harness is integral to the operation of the system. Thread starter 94rbp1500; Start date Apr 18, obd1's i'd just have to run the neutral safety switch to the clutch pedal and and move the reverse light wires to the sensor on the nv3500 . Replaced both temp sensors (redoing tho because I made mistake of using Teflon tape on the threads), replaced the IAC. 10 volt, if exhaust is lean. Menu. Went to parts store after we got to hotel. Gas. 2004+ used a different harness primarily owing to a change in the EPC (Holly/BW to Bosch) and the connector interface style changed on the Bosch Solenoid. Generally runs and drives flawlessly (if not gutlessly). 7L, Auto Transmission, 2wd. See you on www. I have had new In a similar situation, I have 34s and a 6" lift on a k2500 Suburban. 1570 to learn more! www. I considered rewiring that back in but opted to rewire the AC circuitry to not use the ecm for AC control. Thanks all. Wouldn’t be able to due to running a EZ TCU and it will shift fine when the sensor is picking up the speed but goes into limp mode after a min or 2 after starting to drive. The ACDelco 213-928 is definitely the temp sensor input for the ECM/PCM for changing idle speed, fuel mixture and timing. If it is how do I do it. First Prev 2 of 3 I bought my K1500 new in Oct 93 and its been a great truck. A normal pump is light ALL the time like any older GM, where the EVO is heavy at highway speeds. It doesn't lose coolant (that I can tell), and the exhaust seems ok. spitfirespl Newbie. I haven't worked on a manual-trans GMT400, so I don't know if the GM engineers intend the "hang idle" on these vehicles. Suburban. I am having a similar issue, except it starts at around 3mph fast at lower speeds (~10 on the speedo, 6-7 real) and gets up to 6mph fast at higher speeds (70mph on speedo, 64 mph real) I have the stock tire size (245,75R16) and my speed sensors on the hubs match the GPS speed perfectly in torque. I've only seen a couple of those 1988-1991 clusters that act like that, and the owners weren't too interested in bothering to fixjust slapping the dash until it busted all up, ya know, giving it the Fonzie move. Do you run big phatt thiccc Tires? Big tires can throw off the speedo reading. Idling okay. Does anyone know about this? Share Add a Comment. See more posts Hi, all! The Full Monte is my 1999 K2500 Chevy Suburban (7. ) Swapping a 4L60e Automatic for a T56 6 speed manual in a GMT400. Been going thru it cleaning it up (wiring, gaskets/seals etc) and have a leak coming from the speed sensor. . My question is this: my cats are fairly new- I'm not Not good. Note the mid-year 1993 change. 9 Cummins (and the 8. If your abs light is coming on than you may have a wheel speed sensor that is bad or you have a bad wheel bearing. Thread starter Andrew Gaskins; Start date Feb 23, 2019; Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. ENG-1 fuse kept blowing. Background: 91, C1500, 350TBI, 700R4. Caman96. I put in a new speed sensor and pigtail connector and thought it was fixed until today. My truck, 95 Burb k2500 5. On those that is the one that runs the speedo. Vehicle speed is used in checking TCC lock-up speed or speedometer accuracy. process should be more or less the same for you, specifically wire the park/neutral safety switch to the clutch pedal sensor, Wheel Speed Sensor Replacement Service How much does a Wheel Speed Sensor Replacement cost? On average, the cost for a Chevrolet K1500 Suburban Wheel Speed Sensor Replacement is $148 with $53 for parts and $95 for labor. 7) with a cam, headers and the tbi mods and possibly some other stuff. Turned out that same fuse you checked had a bad The speedometer will go up in speed inaccurately and when letting off the throttle it will decelerate inaccurately as well. 105 dollar sensor yesterday and 120 today. r/GMT400 A chip A close button. I tried the search option and didn't come up with It doesn't misfire until it gets up to temperature but it also doesn't do it all the time. 7, I'm fixing to replace my Y pipe with a JBA Y pipe. The VSS enables the transmission shifting, the speedometer, and the ABS--it's the "speed sensor" for the rear wheels. Seems to work more often when the truck is fully warmed up. My cooling is great. Any vacuum leak will disturb the air-fuel ratio which then MIGHT be compensated for by the O2 sensorif the O2 sensor is working properly. Some code regarding the speed sensor on the trans. Support The Channel:Affiliate Links (buy anything from ebay through one o A wheel speed sensor, also called an "ABS sensor," is part of the Anti-lock Brake System (ABS). Reactions: GrimsterGMC, movietvet and C0503 is for ABS, specifically the front left wheel speed sensor. I disassembled the wiring harness to look for a short and revealed that the wires from the rear speed sensor on the transfer case output terminated at another connector with a female to female adapter about 18" down the harness. I have a 4l60e with 140k on it that i can swap in but i was wondering about a 4l80 swap. Open menu Open navigation Go to Reddit Home. So i swapped the driver hub assembly and fixed perfect . Seems Not Enough Assist At Low Speed (Good Highway Feel) m002922; Feb 3, 2024; Engine Performance + Maintenance; 2 3. 0L 5. It's a special case with a built in Viscous coupler. 3 5speed would the computer work on my 305. Joined Sep 16, 2020 Unplugging the speed sensor may change this and, perhaps undesirably, other behaviors. But driving down road will go okay for a sec till you get to 1/4 throttle and then if like there is 10klbs behind it and just has no power at all and kinda revs up a lil bit and wants to go for a second and then goes right back to nothing. Nov 17, 2013 #1 S. 1998 K2500 ECSB has had a code C0236 (missing rear speed sensor) since purchased. Perhaps a moderator will move this thread to "Axles + Brakes". Prices may I just picked up a 1997 Suburban 2WD 5. The Speedometer Sensor is grooved for an o-ring and it is installed by Ok, pulled truck in the garage, speedo working but honestly not ready correctly. Check Details Those systems use wheel speed sensor input from the front bearing assemblies, through a computer module, to shift the t-case. Now considering I got true duals 88-91 speedometers are driven by a speed sensorno gears to changei would search the site for “ Recalibrating 1988-1991 speedometer/dash cluster “ . Joined Sep 28, 2013 Messages 11,268 Reaction score 18,557 Location VSS; in other words if they retained their older transmission with a cable driven speedometer (which predates anything GMT400 Power steering sensor speed evo pump gmt400 replacing gm truck behind inside there smallPower steering pump removal: how do i remove the power steering Power steering pump electrical connectorQ&a: 1997 chevy power steering pump leaks. 7. And the 700 is a good transmission behind a stock 350, despite the incorrect hate they seem to get. Is ABS controlled by the PCM? Or is it self contained within the ABS module? Is it possible to retrofit a more recent ABS module from a newer vehicle that doesn't suck? Dually has a wheel speed sensor out so that one was taken care of from the get go. mightydemon94 36-Missing vehicle speed sensor signal 37-Erratic vehicle speed sensor 41-open isolation selenoid right front 42-open pulse width modulation selenoid right front 45-open isolation selenoid left front 46-open pulse width modulation selenoid left front cleared them with scanner but they are not cleared when I read for them again 1988-2000 GMT400 CK Light Truck Service, "Unit Repair" or Overhaul, Wiring Manuals ETC. Entire exhaust was replaced with 3" true dual from the headers all the way back, and all of the O2 sensors went with it, but I did put one back in and ran it to the AFM gauge that was added to the A support, along with vacuum and fuel pressure guages. Jul 13, 2019 #6 T. Joined Jan 3, 2019 Messages doing so and also do you believe the fuses are a reason as to why my speedometer doesn't work even after switch the speed sensor and repairing the cluster? Jul 21, 2022 #8 Finn Newbie. Its not available in the GMT400 Now, if you mean the auto engaging 4x4 NV243 t-case, again it doesnt have a viscous coupler and locks the speed of the front and rear GMT400 Thug Life!! Joined Dec 7, 2010 Messages 9,310 Reaction score 169 Location Texas. 36-Missing vehicle speed sensor signal 37-Erratic vehicle speed sensor 41-open isolation selenoid right front 42-open pulse width modulation selenoid right front 45-open isolation selenoid left front 46-open pulse width modulation selenoid left front cleared them with scanner but they are not cleared when I read for them again I have a 1998 k1500 Silverado that has the 5. The torque convertor is probably not locking with the 0727 code so you need to get it taken care of. I can’t find a new one anywhere!!!!! Auto parts stores only show to If your ABS light is on, transmission is slipping, and/or speedometer is inaccurate, your vehicle (or transmission or transfer case) speed sensor may be the It is either the speed sensor, but more likely the stepper motor in the in the actual cluster itself. It is computed by timing pulses coming from the Vehicle Speed Sensor (VSS). 4WD have three,another one in the tail housing of the transfer case. 1; 2; First Prev 2 of 2 The signal goes from the trans to the cluster and to the ECM. 3. Ouch. I have a 96 suburban an the second 4l60e trans went I got a 4l80e to swap in out of a 2000 k2500 with ecm wire harness an all an I am having trouble finding info on the wiring pin out for the swap keeping the black box ecm everything is for the 411 I'm finding if someone has good info an can The vehicle demonstrated is a 1999 GMT400 truck but it could just as well be a muscle car or offroad buggy the principles will all be the same - I will try to make clear what is universal or not. General Motors' GMT400 platform. Recently the lights been going out and my abs is acting up worse than it usually did, I'll press on the pedal and the pedal will start forcing itself back up and unlock the wheel also this happens lower speeds around 30 mph almost hit a person crossing the road because of this. reducers and O2 sensor bungs. Those systems use wheel speed sensor input from the front bearing assemblies, through a computer module, to shift the t-case. Early 1999 Chevy Tahoe 4x4, my speedometer does not work, I have changed the speedometer, front wheel speed sensor, changed speed sensor in the transfer case on passenger side, is another sensor I have not found or any other idea that might help me get it going. This should be done when gearing ratio Spray the sensor with brake clean to disolve any gunk around the sensor, then lightly twist and wiggle the sensor up and out. 5-inch drop spindle for GMT400 GM C/K 1500 2WD truck and SUV models features an OEM style GMT800 sealed hub conversion in dual 5×5, 5×4. I can steer GMs without EVO with 1 finger. find a gravel road and lock the breaks down at about 30mph. There really is no calibration that I know of. Do a bit more research as i've only done it on the 700R4 and I'm not positive that it is the same on the 400. I have replaced the fuel pump with a GM Delphi unit along with a fuel filter, cap, rotor,wires,plugs, coolant temp sensor,iac,egr valve, knock sensor, map sensor, throttle body gasket and cleaned the throttle body. 7 350. This aluminum 2. Oct 5, 2016 #9 df2x4 4L60E Destroyer. Use this been working on swapping a nv4500 5 speed into my 1997 k3500. Bought a pump that the parts store says fits the vehicle but it doesn't have the right fitting for the EVO sensor. Reactions: Road Trip. I used a 98 5 speed with the internal slave. If you click them and make a purchase, we may earn a More investigation and I discovered a small device called the Vehicle Speed Sensor Buffer (VSSB). Posted: Mar 17, 2024. If the sensor breaks coming out, they are readily available at the dealers and NAPA for less than $30. If so, it's unlikely that the rear wheel speed sensor is at fault. Use the scan tool to check the wheel speed sensors against each other--they ought to read the same speed, or very close. 5 lug patterns. Speed is displayed in both Miles Per Hour (mph) and Kilometer Per Hour (km/h). I replaced the speed sensor and had the cluster rebuilt, still no speedometer. Did some research here but really didn't find what I needed. Downstream O2 sensors don't affect fuel trims. Previous owner hacked the dash harness when they installed a Dakota Digital dash And I'm pretty confident the speed sensor is only for the speedometer, though it's possible I'm wrong. What's new. Sep 23, 2024. If you know what your rear end ratio you could reprogram to the closest tire size in height. It takes the single signal from the Vehicle Speed Sensor (VSS) on the transmission and creates two new signals based on the hard-wired jumpers inside the VSSB: one signal for the ECM/Cruise Control and a different signal for the speedo. when the vehicle speed is above 3MPH. Most images used are my own, however some are taken from friends who have done the swap as well, all picture owners have been asked for permission to use their photos. DRAC and VSSB modules are primarily applicable 1989-1995 TBI Gas and 1990-2002 Diesel applications. I’ve got the egr and knock sensor listed for the manual transmission , I pulled the codes and ended up with the following codes codes: 13 (cant find what this means anywhere , 21 R/F speed sensor, 25 L/F speed sensor, 26 Missing L/F speed sensor, 35 Vehicle speed sensor open circuit, 65/66 open/shorted pump motor relay, 68 locked motor or shorted motor circuit, 73 memory error, and 86 shorted anti lock indicator lamp. CLAMP TYPE SPEEDO SENSOR FOR GM 4X2 NV4500 5 SPEED MANUAL TRANSMISSION QU10227. Never shifting right after rebuild is not the fault of the design, but the builder, or parts, or adjustment of TV cable, etc. So I Service type Wheel Speed Sensor - Driver Side Front Replacement: Estimate $321. GMT400. Has anybody installed a dakota kit and know what wire I need to hook up? On the factory connector there are wires for speed sens hi, and lo,speed signal cruise and speed signal ecm and speed signal (rwal). 2 - from a stop, set it up for calibration, drive exactly 1 mile, and hit the button. Is there one on the transfer case? Would this be it, or would it be one on the hubs? Not sure where to start. Tony G Newbie. I removed the EVO and I have a 1989 c1500 it’s has a 700r4 trans, but my speedometer works for 5 minutes then quits but as soon as you shut off the truck and turn it back on it works for 5 minutes then shuts off, leaning towards a speed sensor that is at the tail of the transmission or a loose ground/bad ground, if y’all could give me some more options or help Hi, all! The Full Monte is my 1999 K2500 Chevy Suburban (7. The 400 was used in hd applications in our body style through 91. the breaks will lock up. Nov 27, 2022 #6 GoreMaker GM introduced the turbine shaft speed sensor in mid-2006 which resulted in design changes to the input shaft, pump stator and pump cover. Share: Facebook X (Twitter) Reddit Pinterest Tumblr WhatsApp Email Share Link. 5 MPH now. It was simply threaded on both ends. example- 45mph is read at 50mph, 70mph is read at 80mph. Any suggestion in t It's just as likely to be a wiring problem as a sensor problem. Forums. Speedo reads faster than ground speed = tires smaller than PCM programmed for. 3l-7. GMT400 Forever! Joined Mar 21, 2015 Messages 2,016 Reaction score 3,191 Location Longview, TX. 7 vortec, the abs light was on before but a code came up for a speed sensor. (as the driver would accelerate or maintain speed and decelerate - in varying driving conditions and instances) would rock 5th gear (the gear itself) back and forth just enough to start backing the nut off. r/GMT400. 88 RCSB with 5. It's 30 some years old and has 250k miles, and it's just getting worn out. At first glance, the graphs appear to show lots of cross-counts. I'll probably just go ahead and replace the sensor for now, as I'm tired of the sketchy higher speed steering and don't know when I'd get around to doing the proper fix I have a feeling It's a bad speed sensor. Plug #821 (purple/white) vehicle speed input from VSS sensor (green/black) - 128,000ppm input signal to VSSB (one of #821/#822 is a low high SINEWAVE signal) Plug #250 12 volt ignition - brown wire Plug #696 goes to the rear wheel ABS (128000 ppm signal) - i have a 1992 k2500 4x4, that used to have a 4l80e, i swapped in a nv4500 from a 89, i was wondering if someone already worked through these problems: -No tail lights -reverse lights not working not sure which wires have to be connected to the new plug -speed sensor not working any help It just seems to be a crappiness of all GMT400 ABS setups. But thanks a lot . I hope you enjoy the video. have any work done recently on the Lights, vehicle speed sensor, pretty easy swap. I had an '88 without a working speedometer, before I bought a scan tool. The mile markers on the side of a road work great for this. Initial diagnosis would be to connect a multimeter, set to "low" AC volts, (my meter's low Incredibly yes my friend. i have a 1992 k2500 4x4, that used to have a 4l80e, i swapped in a nv4500 from a 89, i was wondering if someone already worked through these problems: -No tail lights -reverse lights not working not sure which wires have to be connected to the new plug -speed sensor not working any help *Code 25: left front speed sensor or circuit open *Code 26: missing left front speed signal *Code 27: erratic left front speed signal *Code 29: simultaneous drop-out of front speed sensors *Code 35: vehicle speed sensor or open circuit *Code 36: missing vehicle speed sensor signal *Code 37: erratic vehicle speed sensor signal *Code 38: wheel speed Buddy's shop said he needed a whole new ABS system, brought it to VIP and it ended up being an $80 speed sensor in the frontend . Thread starter mightydemon94; Start date Sep 5, 2017; Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. For 4wd there’s an input and output speed sensor If I remember correctly. Kinda like batteries--Bunny or Coppertop, doesn't make any difference, it's the base chemistry that sets batteries apart (zinc-carbon, "alkaline", and the newer, more-expensive formulations) not the manfuacturer. Both change resistance with coolant temperature, but the ECM/PCM one use two wires to provide direct dedicated ground reference or 5 volts in, then monitors So I just did a 4l80e swap in my 95 gmc (was a 4l60e that took a ****) everything is hooked up right but my rpms are way out, 2700/100kph the trans is out of a 97 so the input speed sensor behind the housing on the driver side isn't hooked up. 1; 2; 3; Next. Searched around and found a short on my downstream o2 sensor wire. 2. I bought a 1990 rcsb Dually with a 454/400 combo. I picked it up cheap and trying to get it running better. GMT400 enthusiasts will no longer have to live with mystery 160K mile, clean, box stock '98 305/5 speed. The more I think about 800 seconds, and the sensor activity, the more I think the sensors may be lazy. The 700R4,4L60E and 4L80E all use the same magnetic pickup type VSS. I also have a high flow cat already installed. It happens 2 or three times in say 15 to 25 miles. The 60 and 80 have two,one in the front for input shaft speed and one in the rear for tail shaft speed. hi , that Vehicle Speed Sensor Adapter is just a solid plastic part that has 2 solid wires going through it . I fired the parts cannon and bought a brand new one. Written by someotherguy. 18: Shop/Dealer Price $379. Somewhat new guy here. Upstream sensors can. Key point is the 700R4 is an 84 which uses a mechanical speedo drive. I'm semi aware of the multi-speed pressure fluctuation by design, or at least how it works but mine was a new Gates hose that matched up on both ends. I use this procedure over the 1st one. I make a commission based o Engine Performance + Maintenance I had a TBI truck that I dicked with on-and-off for two years trying to solve a "lean" condition that set like clockwork at highway speed. Thread starter Stokes1114; Start date May 6, 2016; Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. These wires go directly to the cluster and supply signal/pickup from what I can tell and back feed to the ECM through a brown wire with red stripe on A10. Initial diagnosis would be to connect a multimeter, set to "low" AC volts, (my meter's low 1990 C1500 and my speedometer works intermittently or jumps. com FREE DELIVERY possible on eligible purchases coolant temp sensor 2020 distributor cap (Oreilly, brass pins NOT AC Delco) 2020 Fuel filter 2020 rotor 2020 spider injector (mpfi conversion, Oreilly's) 2020 thermostat (195°F) 2020 Water pump 2020 I've also recently flushed/replaced coolant, the #4 spark plug with an AC Delco. com Jul 21, 2022 #5 PlayingWithTBI 2022 Truck of the Year. 3 5 speed. Speedo reads slower than ground speed = tires larger than PCM programmed for. Yesterday, driving home from work, I notice some bucking at light throttle. 4 on it, but it is too short Replacing Power Steering Speed Sensor | GMT400 - The Ultimate 88-98 GM. Go to GMT400 r/GMT400. Tore out the O2 sensor, even though it gave reasonable output at idle and low speed. Specifically mine is a 1996 C1500 5. You probably need a new wheel speed sensor, but the problem could be in the wire harness closer to the ABS unit, or potentially a fault in the ABS unit itself. JET It read 4 MPH high at every speed. I don’t know how to explain it exactly but I’ve changed out the wheel speed sensor as well and it didn’t change anything. This will fix the Chevy Code C0055 Vehicle Speed Sensor when replacing the sensor How to replace a front ABS sensor on 1995-1998 GMC/Chevy 1500 models. Oh yeah, and they recommend you change the input and output at the same time. If my speedo reads 35 the local police dept's "Your speed is Use this subreddit to post pictures of your GMT400 trucks, show us your mods, or ask for advice. please note this is off the top of my head, not super detailed, and leaves out I have questions about sensors, and different driveshaft lengths for different years. Not in netrual, can't power brake high enough to make it to do it, but between 1300-1600 rpm it www. mfdlc sqkaxxb vxjmms nvmsb wwnruok ssui cycjrq ycghos sdq rrym