Electrical System Problems of GMC Sierra 3500 - part 2

The service trailer brake icon keeps appearing on my screen I’m afraid it’s going to not work properly when towing trailers it’s constantly going on and off I believe it’s the brake control module switch but also could be in the harness just want gm to be aware of the many blogs that I have read about with this problem the problem first appeared about two months ago.

See all problems of the 2015 GMC Sierra 3500 🔎.

Transmission control module failed. Reduced power to vehicle to first gear. Blinkers, speedometer door locks, and other safety and driving devices did not work. Check engine turned on. Device is held at some GMC dealerships nationally however they will not sell the part to have the truck repaired.

See all problems of the 2014 GMC Sierra 3500 🔎.

The component that failed was the passenger side or main battery. Our safety was compromised when the design of the hvac system and the battery location allowed the hydrogen sulfide gas into the passenger compartment of the vehicle. The issue has not been confirmed by a deal or independent service center. The battery(s) and vehicle are available for inspection to confirm the issue. I have uploaded pictures of the battery and one can visually see the swollen battery with liquid leaking out of it. There were no warning messages or other symptoms prior to the failure. The rotten egg smell started shortly after the truck was started and my three young children were in the truck for about 10-15 minutes while I was loading items in the bed of the truck. When I entered the vehicle, the smell was extremely strong and my eyes started burning. I opened all the windows to air out the passenger compartment and thought it was possible off gassing from the nearby septic field. Once driving with the windows now closed, the smell came back instantly and very strong. My children started complaining of headache and nausea. For the next part of the trip, we drove with the windows down. When we arrived at our destination, I was able to determine the smell was coming out of the hvac system while in normal "auto" mode. Opening the hood, I went to smell around the engine compartment and when I got over the passenger side main battery, the rotten egg smell was so strong that my nose and eyes instantly started burning. We then drove the truck home with the windows closed and the hvac system in recirculate but the smell still entered the passenger compartment. All four of us had symptoms of hydrogen sulfide poisoning with my son being the worse with multiple vomiting episodes immediately upon exiting the vehicle. Poison control was notified and all four of us were evaluated in our local emergency department for inhalation toxin. The truck is all oem.

See all problems of the 2020 GMC Sierra 3500 🔎.

I had the rear defrost running, and began to hear a sizzling/hissing sound in the back seat. After a minute of hearing this noise, I noticed smoke coming from the rear sliding window. I immediately turned off the rear defrost. A few seconds later, I heard a loud pop and the passenger side of my rear window was shattered. I called and spoke with the dealership and explained what had happened. They said they knew exactly what had happened and it is pretty common in these trucks.

See all problems of the 2016 GMC Sierra 3500 🔎.

The service brakes lights has come on a d disabled my brake controller. This is a safety issue while towing and completely unacceptable.

See all problems of the 2012 GMC Sierra 3500 🔎.

Infotainment system and center instrument cluster went completely black - six times over the course of one month. I took the truck to alan webb Chevrolet in vancouver washington. Their service technician was aware of infotainment system “black screen of death - bsd” problems due to previous repair work on several different gm models. However, on the way to their service department to get this fixed, I rolled down the driver’s side window about 6 inches to get some fresh air and rolled it back up. Out of nowhere the infotainment system and the center instrument cluster came back to life. No rhyme, no reason and both stayed on (illuminated). Their service technician could not recreate the bsd. They had my truck for more than one week and said they were working with gm engineers to resolve this issue. Gm case number sr 9-7065134382. I’m driving and towing my 5th wheel blind without a remedy for this electrical issue.

Trailer brake wiring connection continually disconnectsthen reconnects some time later. Some periods of up to 10 minutes without having trailer braking power. Major safety issue when toeing fifth wheel trailer. We lost brakes going down steep grades. GMC is aware of issue, but has not provided a solution. Vehicle has been yo service shop with no resolution. Case has been opened with GMC.

See all problems of the 2021 GMC Sierra 3500 🔎.

The computer malfunctions. It is available for inspection. The computer lights up and causes failure in the trailer brakes. Glenn polk the dealership in sanger texas has been working on a fix but has yet to come up with one. I have spoken with general motors representatives several time trying to resolve the problem without result. I also emailed the ceo last Friday and have heard nothing. There were no warning lights until seconds before failure.

My truck is affected by gm’s engine block?heater safety recall (NHTSA 21v?496 / gm n212329840) addressing a risk of short circuit and potential engine?compartment fire at the heater cord/terminal connection. Gm’s interim action has been to remove/disable the block?heater cord, which my dealer did, and then marked the recall “completed. ” as a result, the NHTSA VIN tool shows 0 unrepaired recalls, even though no actual repair/restored functionality exists and gm continues to advise owners not to use the block heater until parts are available. Safety concern / impact: I live in a cold?weather area and purchased this diesel expecting a functioning block heater for reliable cold starts. Disabling the heater has removed an intended cold?weather safety/starting aid for multiple winters without a final fix. Gm’s bulletin explicitly allowed dealers to disable the cord to close the recall, rather than provide a repair, leaving owners without the feature indefinitely. Suspiciously, I have also had to replace glow plugs on this truck sooner than traditional wear / failure rates would demand - including one glow plug that has been replaced twice in short span of time (should have lasted years). I continue to monitor gm’s recall portal; still no parts/remedy schedule. Please review whether gm’s chosen remedy—disabling a safety?related feature and closing the recall—is adequate and within a reasonable time under the safety act. If not, I request NHTSA open a recall query into remedy adequacy and timeliness so owners receive a real repair (replacement heater/cord/connector) or appropriate alternative remedies.

See all problems of the 2017 GMC Sierra 3500 🔎.

Driving to work. Power steering went out and braking system seem to be ineffective. Instrument panel service light came on with the battery indicator displaying "battery charging system" fault.

See all problems of the 2019 GMC Sierra 3500 🔎.

The computer lights up the dash reducing power and turning off power to trailer brakes. This has almost caused an accident on several occasions . It happens a couple of times per trips. This vehicle has been in the shop a couple of times per month since it was put into service. Glenn polk Chevrolet has worked on it each time and the problem is still there. This truck has also had several injector issues. There is an open case with this vehicle with general motors with no resolution. I have filled out forms on each of my 2020 GMC's 3500's.

The computer lights up dash reducing power and taking the trailer brakes away. This almost caused a wreck when the truck shut off and the brakes failed. This truck has been in the shop at least once per month trying to fix the issues, from computer and brake failure to injector failure. Glenn polk Chevrolet in sanger has been working on this since the truck was new. Also we have case open with general motors without resolution. The dash lights up at the same time as the brakes fail.

The computer lite up the dash and reduced power, plus took the trailer brakes off line. This happened while loaded. To reset the system you have to pull over and turn the vehicle off. This happens 2-3 times per day. This was a problem at 600 miles. The transmission shifted from 10 gear to 5th gear while driving 75 miles per hour. The truck had 75,000 miles on it . Had to send another truck out to pick up the load in santa rosa new mexico. The dealer glenn polk in sanger has been working on for the last 4 months there is never a warning until the lights come on with a system failure.

The communications quit working, I can not use the hands free on my phone.

This vehicle has had numerous electrical issue from the first few months of ownership. The trailer brake system failed and was replaced on October 2014. The vehicle has had many recalls that have been corrected by owner and service provider. The second summer of ownership the vehicle had radiator issues, and most recently electrical issues again and transmission issues. While driving the vehicle electrical dashboard goes into a flicker and shuts down. GMC was able to fix this issue at the owners cost with the vehicle being out of service for 3 weeks. GMC was to reimburse the owner for costs of a gm dealer that was not able to fix the issue (painter automotive)(February 9, 2017) of $300, this has not been reimbursed. The vehicle is now at the service station as it does not start with no codes. It has been out of service for 2 weeks and counting, this vehicle is no longer reliable or safe for us to drive. We have documentation of all the issues and video of the dashboard flicker.

Traveling at 60mph on turnpike pulling long heavy trailer in rain at night with moderate to heavy traffic. Sudden shutdown of all systems. Engine shut off and all electrical systems shut down. Unable to restart or get electrical systems to work. Worked vehicle to shoulder and had it towed to a dealership. Waiting for them to open to diagnose and repair. This mechanical and electrical failure had the potential for a catastrophic incident.

I drove my wife to the pharmacy and after pulling out of the parking lot onto palmdale road in victorville the truck went into to limp mode. The transmission locked up into park at 25mph almost causing a rear collision behind us. The GMC Sierra 3500hd 2009 came to a screeching stop causing a bit of whiplash to my wife and daughter on board. The tcm transmission control module along with the allison transmission failed causing this close accident. The vehicle is inoperable at this time. This is a dangerous defect.

See all problems of the 2009 GMC Sierra 3500 🔎.

Fuse box under hood caught fire while parked.

See all problems of the 2004 GMC Sierra 3500 🔎.

The contact owns a 2007 GMC Sierra 3500. While driving 45 mph the brake light warning and the abs lights illuminated on the instrumental panel. The headlights began to flicker; however, after shutting the engine off and checking under the hood the contact was unable to diagnose the failure. When he restarted the vehicle the brake light shut off and without warning, the transmission began to shift up and down at will. The dealer stated that the computer did not register any failure codes. The dealer also stated that if the failure recurred to allow them to diagnose the failure before shutting the engine off. The VIN was not available. The failure mileage was 12990 and the current mileage was 13050.

See all problems of the 2007 GMC Sierra 3500 🔎.

Speedometer erratically shows incorrect speed while driving. Sometimes displaying 120mph or 0mph. Very dangerous and should be a mandatory recall checked with dealer and would cost $800. 00 to replace bad instrument cluster. Only has 73,000 miles.

Speedometer was off a lot!! 74 mph while sitting still, 130+ mph while driving at normal road speeds. I did not know how fast I was traveling. School zones etc. Never know if I was speeding or not. This happened several times while on vacation in California. Sometimes it was normal, but it got worse. It first happened at about 65,000 miles. I contacted my dealer and was told it may be under warranty, as many have had this same problem. They said my 2005 GMC did not fall under a warranty. I had to pay $356. 70 plus tax to have the instrument cluster replaced. I asked for the old parts, but was told gm needed it back so they could rebuild it for the next failure!! it seems gm is covering certain serial number vehicles built prior to mine. 2003 and 2004 model years, but mine is a 2005 and its not covered! why? I have never heard of such a problem, and I have owned 11 gm made vehicles and never had a speedometer go bad. Hopefully you can get them to cover this.

See all problems of the 2005 GMC Sierra 3500 🔎.

Parts of the cluster, tachometer, fuel guage, oil pressure, amp guage have failed one after the other. Although 04 model was covered under a recall, the same exact cluster was used in the 05 GMC and nothing has been done and not covered under warranty. Several GMC owners have this same issue.

Vehicle intermittently stalled while driving at various speeds. Condition forced driver to pull off the road. Power steering and brakes failed when vehicle stalled. Dealer replaced at 28000 miles the fuel pump and computer, but same problem recurred.

See all problems of the 1996 GMC Sierra 3500 🔎.

I have had electrical problems with this truck since purchased. It has been in the service center 3 different times with no resolution. Now the engine will not turn over and when attempting to use booster cables to start the cables began to smoke and the copper wires melted. In an attempt to remove the cables before the other car ignited I was burned. Additionally the truck keys were not in the on position. That is I had not attempted to start the vehicle yet.

See all problems of the 2000 GMC Sierra 3500 🔎.