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Showing results for tags 'ebcm'.
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Brake Errors During DPF Regen
SpeedRacer350 posted a question in Ask the GM TechnicianI have a mystery: I get the ABS and Brake Light error warning lights ONLY DURING REGEN. The speedo, all gauges and the brakes work fine. The lights go out after restarting, but will come back if regen is still happening. I can pull the following codes: C0055-0f invalid data received from electronic brake control module - signal erratic U0100-7f lost communication with engine control module bus - signal erratic I've checked all the chassis grounds, battery grounds (all .3 or .4 ohms) and the condition of both batteries (both 12.7 volts after sitting over a week). I have replaced the vehicle speed sensor to no avail. I'd like to think that the EBCM is not bad since it works fine when there's no regen happening. However, I still need to check the ground to it's connector. And I am open to replacing it since it's only $130. So, here are my questions: Does anyone know the ground pin(s) of the EBCM connector? If I get the exact EBCM unit, does it have to be reprogrammed for a 100% stock truck? (stock wheels/tires) Does anyone have access to any dealer TSB for this condition or have any other insight? the truck: 2013 GMC 3500 Duramax, dually, crew cab, SLE, 4x4, only 25k miles, clean and pampered thanks in advance!
Gear change confusion
cr250Silverado posted a topic in 2014-2019 Engine, Driveline, & ExhaustI have read so many posts, and messaged a few people across two forum sites; however I am still confused about a gear change on the 2014-2018 (mostly on the 2016+) trucks. I know the parts are available, and it is possible to change the physical gears. Where I can’t seem to find an answer is about reprogramming the various separate computers. If I understand it correctly, the available programmers can ONLY reprogram the ECM for tires and gears which only fixes the speedometer, and no one can reprogram the transmission, vvs unit, or the ebcm (abs), which is why some get the abs and brake codes after gear swaps despite reprogramming the ECM. I can’t help but believe this will also have a severe negative impact on the truck’s stabilitrak system, which I want to keep working properly. Is there anyone who HAS ACTUALLY swapped their gears AND reprogramed their trucks on this site? If so, what specific components (ECM, transmission, etc.) were reprogrammed? Does your truck have any error codes including the abs/brake lights/codes? What programmer was utilized for the programming? It also appears GM changed one of their computers for 2016+ trucks so access is limited and it’s harder to get into the computer for changes?
Hello, I recently bought a 2000 GMC Sierra 2500 extended cab SLT 2wd with the 5.3L. I was very excited about this truck initially as I got it at a great price, but I am starting to become overwhelmed with all of its problems I recently discovered. The previous owner purchased this truck at an auction, and put a lot of new parts on it mechanically and cosmetically. There are a lot of mis-matched parts on this truck and I can tell it is somewhat of a "Frankenstein." One thing I noticed is that there are 4x4 buttons on the dash, even though this is a 2wd truck (no T-case). So obviously someone put a new dash on from a 4wd donor. Also, the plastic around the ignition cylinder looks like its been monkeyed with, so someone was probably fooling around near the steering column. When I test drove the truck, the only light on was "Service Engine Soon." However, when I brought my truck to get an OBDII scan at the parts store it returned 14 codes (some duplicates) which are as follows: B0017 - Passenger frontal deployment loop open B0024 - Driver deployment loop short to ground B0036 - Discriminating sensor open or short to voltage B0051 - Deployment commanded C0265 - EBCM relay circuit P0430 - Catalyst system - Low efficiency (Bank 2) P0440 - EVAP system P0449 - Evaporative canister vent solenoid control circuit But, NO lights are ever on the dash except the SES. Shouldn't the airbag or SRS light be on as well? On startup the only lights that come are the SES, nothing else. All the gauges work, although they bounce oddly when I shut off the truck. The voltage needle also twitches very slightly when I use the turn signal. Also, when I turn on the headlamps, the only thing lit up is the cluster. The radio, climate controls, and everything else is dark. And, when I cleared the codes with the ODBII scanner, the radio went off and reset itself to 1:00?! I have literally spent hours on end searching in vain for a definitive answer to this host of problems with only little success. I am guessing that the "B" codes mean that I need a new SDM? Perhaps this truck was in a wreck? P0430 might be because of a small exhaust leak this truck has, or possibly the cat is bad. P0440 and P0449 might mean I need a new EVAP solenoid or can? Please help me, it would be greatly appreciated. This truck means a lot to my little family as it is how we are getting across the country for my new job in Tallahassee. Any insights would be very welcome. Thank you all.
99 Silverado with 195k miles, recently replaced EBCM. Had to slam on the brakes in traffic and quickly realized ABS system is not functional. It never kicked in and my truck immediately went into skid. Luckily, stopped a few ft. short of the car in front. Where to begin? Is there any easier way to test ABS without driving around town and slamming my brakes? My initial thought is to focus on the ABS wheel sensors? thanks in advance.
Here is my issue: About 18 months ago I changed my rear axle ratio from a 4.10 to a 3.08 (2 wheel drive). Knowing the ECM had to be reprogrammed for the axle change, I sent out the ECM for an off vehicle reprogramming. After the reprogramming the speedometer accuracy / driveability is perfect throughout the speed range. The person who did the ECM reprogramming, stated he could not reprogram the EBCM. Looking through my 2001 GMC ST service manuals (3 of them) the ECM also sends a speed pulse signal to the EBCM circuit 1827, terminal B1. With the changes I made so far, this generates a code of P0238, Vehicle Wheel Speed Mismatch (no other codes present) along with the ABS / Brake light coming on after the first mile of driving. I fully understand all the concepts, diagnostics and needed corrections to this issue, but here is my question: Who in North America can reprogram this EBCM to have it recognize that this vehicle has a 3.08 axle instead of a 4.10 ??? I know somebody will say take it to the dealer and use a Tech 2 for the reprogramming. I have approached 10 plus Detroit area dealers over the last 18 months and they tell me my "truck is too old", or they will only be able to program what is assigned to the VIN number. The performance shops in southeastern Michigan are also clueless on what to do, they tell me to pull the fuses. I cannot believe I'm the only person in North America that has done this. Can anybody in this forum suggest a place / person who has the capacity to make this software change within this EBCM???