GMC Sierra Complaints

15,732 consumer complaints on file.

#11471842June 30, 2022
ELECTRICAL SYSTEM:WIRING
The contact owns a 2021 GMC Sierra 1500. The contact stated while attempting to start the vehicle, the vehicle failed to operate as needed. The service parking brake, check engine, and other unknown warning lights were illuminated. The vehicle was towed to the local dealer to be diagnosed. The contact was informed that the failure was due to damaged electrical wiring caused by rodents. The contact was informed by the dealer that the wiring insulation was made from soy-based materials. The vehicle was repaired three times due to the failure. The manufacturer was notified of the failure. The approximate failure mileage was 23,300.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11471610June 29, 2022
UNKNOWN OR OTHER
The entire frame of truck has rusted through.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11471553June 29, 2022
SERVICE BRAKES
Loss of power assist at slow speed when backing or going forward. This has happened several times since I have had the vehicle. Brake pedal is very hard to press and vibrates.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11471359June 28, 2022
ELECTRICAL SYSTEM:12V/24V/48V BATTERY
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.
Crash:
No
Fire:
No
Injuries:
4
Deaths:
0
#11471373June 28, 2022
VISIBILITY:WINDSHIELD
The contact owns a 2022 GMC Sierra 2500. The contact stated he entered the parked vehicle and closed the driver’s side door and heard an abnormal noise and became aware that the rear windshield was shattered. The vehicle was not diagnosed or repaired. A dealer was not contacted. The manufacturer had not been informed of the failure. The failure mileage was 1,385.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11471127June 27, 2022
AIR BAGS
The contact owns a 2015 GMC Sierra 1500. The contact received notification of NHTSA Campaign Number: 21V504000 (Air Bags) however, the part to do the recall repair was unavailable. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. The contact had not experienced a failure. Parts distribution disconnect.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11470575June 23, 2022
ENGINE
bad lifters causing hesitation and and hard shifting.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11470390June 22, 2022
FORWARD COLLISION AVOIDANCE: WARNINGS, FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL, LANE DEPARTURE: WARNING
Truck has the safety package on some point stop working bring the truck to the dealer but they don’t know how to figure out I need help with this.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11470454June 22, 2022
STEERING
The contact owns a 2015 GMC Sierra 1500. The contact stated while driving approximately 35 MPH and making a right turn on an icy road, the vehicle lost power steering functionality. The contact was able to control the vehicle however, extra effort was needed to steer the vehicle. The contact stated that the vehicle independently regained power steering functionality. The contact stated that the service power steering warning light was illuminated. The contact stated that the failure recurred while turning to the right or the left and persisted while driving. The vehicle was not taken to a dealer or independent mechanic to be diagnosed. The vehicle was not repaired. The contact researched online and related the failure to NHTSA Campaign Number: 18V586000 (Steering). The manufacturer had been informed of the failure. The failure mileage was approximately 65,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11470085June 20, 2022
EQUIPMENT:ELECTRICAL:INFOTAINMENT, ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL
Informant system and instrument clust/panel starts to change with nothing be clicked. Starts to phantom change everything which is deters from paying attention to actual driving becoming a safety hazard. Dealership has tried to update the software and still does not work.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11470123June 20, 2022
POWER TRAIN
The 8-speed transmission in 2 and 3 gear exhibits a hard shift...no slippage. When slowing down to a stop you hear what sounds like two steel barbell weights slamming together. You feel like the transmission will break and leave you in the middle of an intersection. I have visited the dealer and they state this is normal. My vehicle only has 41000 miles on it. This has been an issue for me for the last 3 years.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11470130June 20, 2022
UNKNOWN OR OTHER
Dash has at least 7 different cracks and failing in several spots
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11469979June 19, 2022
UNKNOWN OR OTHER
Dash is cracked in multiple places. Dash is not structural however loose shards of plastic pose a serious safety hazard if they were to come loose as a the result of a sudden change in acceleration. Vehicle is low milage with 130k miles, previous owner failed to report or repair the failed dash prior to my ownership. It is a common failure on GM vehicles however it is very expensive to repair, unwarranted, yet poses a serious safety hazard. Dash will need to be repaired to ensure the safety of me and my family.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11469980June 19, 2022
ENGINE
My truck recently had an engine lifter fail when pulling out onto a very busy road. When I accelerated hard into traffic my check engine came on and I suddenly lost most of the engine power and it went into limp mode. I was almost rear ended when my truck nearly came to a stop. I was told it is a defective/poor design of the cylinder deactivation system from the dealer. Ther is no fix but to replace with the same lifter part number which was done and it also failed again 4 days later in a similar situation turning onto a road into traffic. My truck is now back in the shop to have lifters replaced twice in one weeks time.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11469897June 18, 2022
FUEL/PROPULSION SYSTEM, ENGINE
62,000 MILES. P0307 error. Replaced spark plugs, coil. head removal, lifter replaced and now another bad lifter. Faulty Active Fuel Management Lifter (AFM Lifters) that results in the Valve Train Defect. In shop for lifter repairs.(2nd time) Cost is $3000. Well maintained truck with all required service completed. Never even towed anything. Vehicle should not have these issues with this low mileage.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11469553June 16, 2022
ENGINE
The engine shut off completely at a traffic light and didn’t start when I pressed the gas pedal to move. It has auto start to save gas and normally starts and stops at lights. This time, the car shut off completely, and I had to completely cycle through starting the car. I almost got rear ended because I took my foot off the brake to drive, and then nothing happened when I pressed the gas.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11469606June 16, 2022
POWER TRAIN
While putting truck into gear the transmission will not engage and will rev up and then take off or when coming to a stop the adaptive shift clunks very hard as if someone has hit you from behind. It will then surge forward without any warning. I have had it in to the dealer several times and they tell me it a know issue but they wont do anything about it.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11469521June 16, 2022
VEHICLE SPEED CONTROL
I investigated and Unintended Acceleration crash that occurred on 8-9-2021. The vehicle had just left a body shop where it had repairs to the left front of the vehicle near the ECM. The driver reported the vehicle would not slow down. He face timed a witness and showed her his foot was on the brake and not the accelerator pedal collaborating his statement. The 2020 GMC accelerated to 93 miles per hour crashing into the back of a Cadillac Escalade. Upon impact the fuel tank of the Cadillac exploded igniting both vehicles on fire and burning a fed-x truck that was folded in half from the sever impact. The EDR report stated the brakes were applied fully for a full 5 seconds prior to the crash while the vehicle was still accelerating. The accelerator was reading a constant 57% during the lead up to the crash and the brake rotors showed heat related glazing from excessive braking. The engine torque was also at 1023NM leading up to impact collaborating Unintended Acceleration further. Based on the evidence gathered my opinion is there was a short in the components in the left front of the vehicle most likely the ECM harness that caused the crash. It is unknown if the damage was caused by the previous crash, the body repairs or a manufacture defect at this time. The radiator had also just been replaced so moisture could have contributed to the malfunction. If moisture shorts APP-1 to APP-2 the safety systems can fail to detect a single fault because it causes redundant faults
Crash:
Yes
Fire:
Yes
Injuries:
7
Deaths:
0
#11469489June 15, 2022
POWER TRAIN
Transmission slams into gear in drive and reverse while driving it will slam into gear. And occasionally at speeds under 5 going up a hill it will have no power and struggle. I have 59000 miles on it last year around 53000 miles they did a transmission flush and that fixed it for about 9 months. Just took it back in they reprogrammed the transmission and it no longer slams In drive and reverse but still knocks back-and-forth while driving.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11469124June 14, 2022
SERVICE BRAKES, ELECTRICAL SYSTEM
Service trailer brake system warning message. Trailer brake controller inoperable.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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