GMC Sierra Complaints

15,732 consumer complaints on file.

#11623827November 6, 2024
SERVICE BRAKES, POWER TRAIN
The contact owns a 2018 GMC Sierra 1500. The contact stated that the vehicle failed to shift into gear as needed. The vehicle was taken to the dealer, where the contact was informed that an unknown part was loose. The vehicle was repaired. Additionally, the contact stated that while driving at various speeds, there was an abnormally loud sound coming from underneath the vehicle near the transmission. The vehicle was taken to the dealer, where the contact was informed that no failure was found. The contact stated that while driving 55 MPH, the vehicle started to decelerate unintentionally. The contact stated that there was smoke coming from the brake pedal. The contact pulled over to the side of the road and allowed the vehicle to cool down however, the brakes locked up unexpectedly. The vehicle was driven to the dealer to be diagnosed. The dealer informed the contact that the braking system had failed and needed to be replaced. The vehicle was repaired; however, the failure persisted. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 72,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11623863November 6, 2024
POWER TRAIN
The contact owns a 2021 GMC Sierra 1500. The contact received notification of NHTSA Campaign Number: 24V797000 (Power Train); 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 dealer was contacted. The manufacturer was made aware of the issue. The contact had not experienced a failure. VIN tool confirms parts not available.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11623582November 5, 2024
VISIBILITY:REARVIEW MIRRORS/DEVICES:EXTERIOR
The contact owns a 2024 GMC Sierra 2500. The contact stated while driving approximately 55 MPH and towing a 28-foot RV, the contact was unable to safely view the blind spot on the left and right sides of the RV using both side view mirrors. The contact stated that the failure had created a dangerous situation while changing lanes. The contact called the local dealer and was informed that the side view mirrors performed as designed, and that there was no fix for the issue. The vehicle was not repaired. The manufacturer was informed of the failure. The failure mileage was approximately 5,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11623688November 5, 2024
POWER TRAIN
The contact owns a 2016 GMC Sierra 1500. The contact stated that after starting the vehicle and shifting to drive (D), the vehicle hesitated and then lunged forward while depressing the accelerator pedal. The contact stated that the vehicle also lunged forward while depressing the brake pedal with the transmission downshifting. The contact stated there was no warning light illuminated. The contact had taken the vehicle to a local dealer, where it was diagnosed and determined that the transmission fluid needed to be flushed and refilled. The vehicle was not repaired. The contact stated that the failure was reoccurring. The contact stated that the check engine warning light was recently illuminated. The manufacturer was informed of the failure. The failure mileage was approximately 165,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11623737November 5, 2024
FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING
I purchased a 2021 GMC Denali 2500 in December 2023. A couple days after purchasing the vehicle I received a message on the dash saying the front camera was not working. I took the vehicle into the dealership where they said they reset the computer and nothing was wrong with the vehicle. One month later I was involved in a collision where a vehicle turned in front of my vehicle and the Automatic Emergency Braking failed to activate. I applied the brakes but due to my delayed reaction time 1.5 seconds, I broadsided the small vehicle with my large truck. Luckily the speed was only 20 mph and no one was hurt or killed. At this time I did not know my vehicle was equipped with AEB. In October I discovered through GM and a different dealership that my vehicle was equipped with Automatic Emergency Braking. I have had several occasions when the AEB including the crash where the AEB should have activated but never did. In 11 months I have never had the AEB activate. I took the vehicle into the dealership where I bought the vehicle and they said their computer said everything was operating correctly. The tech never drove the vehicle where the AEB should have activated. I have driven many cars and even the same model vehicle as mine, so I know what the AEB feels like and my vehicle the AEB is not working. The dealership told me to take the vehicle they checked everything GM told them to check. When I talked to GM they told me to immediately take the truck to the dealership and the dealership did nothing.
Crash:
Yes
Fire:
No
Injuries:
0
Deaths:
0
#11623467November 4, 2024
POWER TRAIN
We were traveling to our cabin in Southern Utah when the Transmission Control Solenoid Valve stuck in an "on" position. We were unable to accelerate more than 55 miles per hour. We stopped in St. George and went to the Chevy dealer for a fix. We were told that they could not get to our vehicle for 2 weeks AND the part is on national back order for 6 weeks. Clearly if it is on national back order, this is a major problem in GM trucks. Our truck is still under warranty and Chevy would not help. We were 130 miles away from home. It was too expensive to tow, no rental cars were available and plane tickets were too expensive. We "limped" the truck home to Las Vegas at 55 mph. Speed limits on [XXX] range anywhere from 65 to 80 mph and there are no back roads. Those speeds are deadly when we could only accelerate to 55. 3 times we were almost rear ended by semi trucks because they came up behind us on a curve at 75 mph. This part failure can be deadly. Fortunately, it was daylight and weather was mostly clear. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11623106November 1, 2024
ENGINE
The contact owns a 2022 GMC Sierra 1500. The contact stated that while driving at various speeds, the engine was making an abnormally loud knocking sound. The contact stated that the engine would run quietly and then begin making the knocking sound intermittently. The knocking sound had increased in loudness over time. There were no warning lights illuminated. The vehicle was taken to the dealer who identified the failure as normal. The vehicle had not been repaired. The manufacturer was not made aware of the failure. The failure mileage was 25,000. The VIN was unavailable.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11623109November 1, 2024
ENGINE, UNKNOWN OR OTHER, ELECTRICAL SYSTEM
Multiple instances of diesel engine emissions system parts and software failure. While driving, towing or not, the DIC would randomly display a message that the DEF level is low and reduced speed will occur in x-amount of miles and that mileage would then begin a visible countdown on the DIC, sometimes much more quickly than the actual speed I was traveling. In other words, it might at first state 500 miles remaining, but then be counting down from 500 miles by one mile per second of time, or faster. Each instance, I would park and attempt to refill the DEF tank, only to discover that the tank is already full or near full. My truck’s DEF tank has now been replaced twice under warranty with the latest tank being installed at only 35,460 miles on the odometer. During the latest replacement, the technician also diagnosed and replaced the electrical wiring harness related to the DEF tank, stating that one of the connector pins was not reading the required voltage. There was also a faulty diesel particulate sensor that was replaced under warranty. This emissions system is problematic, and it is unsafe to due to the drive ability restrictions it imposes due to faulty software and equipment. I use my truck to tow, and it would make for a very unsafe condition to have my vehicle’s speed become limited as if the vehicle ran out of fuel. Mountain grades. Two-lane highways. Passing through bad neighborhoods. Driving in uninhabited areas, sometimes late at night. Family of 6 in the vehicle. Unacceptable. General Motors Corp. must create a permanent and fail-safe fix for this emissions system and implement the parts. The emissions system warranty should be extended from 80k miles to Lifetime to cover the vehicles affected.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11623111November 1, 2024
POWER TRAIN, ELECTRICAL SYSTEM, ENGINE
DEF Emissions warning and Engine Emissions warning lights suddenly appeared. DEF Emissions warning went on and off multiple times in the two days before bringing to a GMC service location. Informed that the DEF Tank heater failed, a known problem, but that they likely would not have a repair available for over a month and would not be covered by any warranty. The vehicle is now speed limited to unsafe speeds on highways while waiting for the repair.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11623113November 1, 2024
POWER TRAIN
The contact owns a 2021 GMC Sierra 2500. The contact stated while driving approximately 70 MPH, the vehicle lost motive power. The contact stated that the message “Vehicle will not Exceed 50 MPH" was displayed. The vehicle was taken to a dealer and remained for over four months after being diagnosed that the solenoid valve and transmission needed to be replaced. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 50,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11623144November 1, 2024
ELECTRICAL SYSTEM
The tailgate unlatches without being activated.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11623195November 1, 2024
ELECTRICAL SYSTEM: INTEGRATED TRAILER BRAKE CONTROL
The contact owns a 2022 GMC Sierra 3500. The contact stated while the vehicle was parked, the trailer plug was connected, and electrical fuses popped. The contact stated that all the fuses were blown. In addition, the contact stated while driving the vehicle, the trailer brakes failed to function as intended. The contact stated that the trailer brakes went off and on. The vehicle was taken to the dealer where it was diagnosed with trailer brake control module failure. The contact was informed that the trailer brake control module needed to be replaced. The vehicle was repaired. The contact referenced an unknown recall; however, the VIN was not included in the recall. Additionally, the contact stated that the failure had previously occurred, and an unknown part was replaced; however, the failure reoccurred. The manufacturer was not made aware of the failure. The failure mileage was approximately 31,308.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11623215November 1, 2024
SERVICE BRAKES
THE AFFECTED VEHICLE IS A 2017 GMC SIERRA 1500 4X4 CREW CAB TRUCK WITH LESS THAN 34K MILES. WHILE DRIVING THE VEHICLE TODAY THE BRAKES BECAME VERY HARD, LIKE A LOSS OF POWER BRAKES. FELT LIKE THERE WAS A LOSS OF VACUMN. AT SLOW SPEED IN REVERSE THE BRAKES "SHUDDERED" WHEN APPLIED. HAVE NOT TAKEN IT TO A DEALER AS IT JUST HAPPENED WHILE TRAVELING. CHECHED FOR INFORMATION FOR SYMPTOMS ONLINE AND FOUND GM HAD INITIATED A RECALL FOR THIS ISSUE SO I CHECKED THE NHTS WEB SITE TO SEE IT MY VEHICLE HAD A RECALL. SYSTEM INDICATED 0 UNREPAIRED RECALLS FOR MY VEHICLE. SO WANTED TO REPORT THE ISSUE.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11622902October 31, 2024
ELECTRICAL SYSTEM, STEERING
While driving and making a turn at slower speeds, such as parking lots or intersections, the entire dash cluster including the radio screen will go black. The steering will completely lock up and jerk back to the opposite direction. At the same time the Park assist, stability control keeps flashing on and off. Sometimes the truck will shut off and then tell you to roll down the driver window and roll it back up. It is random and you never know when it is going to do it. The only fix I have found is to stop in the middle of the road and restart the truck. You can not drive off the road to do this because you cannot control the steering. I almost drove into oncoming traffic when it did this during a turn at an intersection. I have taken it to the dealership and they say then cannot duplicate it therefore don't know what the fix is. I have read multiple complaints on this on line. I have video but it is too big to send in this email.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11622908October 31, 2024
ENGINE
Exactly what was described in the N192220080 Recall on New Model 2019 Chevy Silverados in cold climates (Like Utah winters) so at 45,280 miles the oil line popped out just like the recall described There were no oil leaks or signs of oil loss in the driveway where the truck is parked. My [XXX] wife (The owner of this vehicle) was only 6 miles from our house on the way to a doctors appt when the “Oil Pressure Low Turn Vehicle Off” light came on. Luckily she wasn't on the freeway so was able to pull into a neighborhood where all of the oil shot out of the engine due to the oil cooler line detaching. Since the N192220080 excluded other trucks made in the same factory as the once recalled in Alaska & Canada, we received no warning of a potential issue like this existing for this model of Silverado. It is also concerning that a known faulty part in all New Model 2019 Silverado 1500s was only recalled in Alaska & Canada. But if we had purchased this truck and registered the vehicle in Alaska, it would have at that point qualified for the free recall replacement instead of the $1,600 bill we were blindsided with (Plus, if she was on the freeway and couldn't immediately pull over, we would have had a seized engine so the truck would have been nearly totaled) INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11622920October 31, 2024
ENGINE, FUEL/PROPULSION SYSTEM
First incident we were driving on the interstate towing a fifth wheel RV, and several warning lights illuminated before everything just shut down. Manage to get to the side of the road. Vehicle finally restarted and the rest of the trip was uneventful. Second incident, vehicle had not run for two days, got in and while the starter cranks, the engine will not start or run. Engine/Transmission service and fuel system service messages showing on app and on email from OnStar. Vehicle requires towing to dealer.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11623007October 31, 2024
UNKNOWN OR OTHER, STRUCTURE:BODY
The upper molding the the grille broke off while driving at high speed and likely caused issues for following cars. After researching the issue, this is a common problem with owners of this model. It is $1,500 to get replaced.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11622743October 30, 2024
POWER TRAIN
The contact owns a 2018 GMC Sierra 1500. The contact stated while driving 70 MPH, the vehicle started shaking violently, prompting the contact to pull over to the shoulder of the roadway. The vehicle returned to normal functionality, but upon the contact continuing to drive to his destination, the failure reoccurred. The contact stated that the RPM rapidly increased and the temperature gauge began to indicate that the engine was overheating. No warning lights were illuminated. The vehicle was taken to an independent mechanic, who diagnosed a failure with the auxiliary transmission oil cooler line, resulting in damages to the transmission. The contact was informed that the transmission needed to be replaced. The vehicle was not repaired. After investigating the failure, the contact related the failure to Special Coverage Adjustment: N182188930. The manufacturer was notified of the failure and referred the contact to the NHTSA Hotline for assistance. The failure mileage was 131,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11622749October 30, 2024
UNKNOWN OR OTHER
The radiator began leaking due to the fact it was falling out of the vehicle. The bolts holding it in became loose and just fell out. No lights or warnings were displayed on the dash to announce an issue was occurring even though the fluid levels had clearly dropped.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11622646October 30, 2024
SERVICE BRAKES, ELECTRICAL SYSTEM, ENGINE
VARIOUS WARNING LIGHTS ARE COMING ON SINCVE I PURCHASED THIS VEHICLE, SUCH AS ABS, ENGINE POWER REDUCED, OIL CHANGING SERVICE, SERVICE ENGINE LIGHT, SERVICE TRAILER BRAKE SYSTEM, WHEEL TRACKING, SERVICE ESC, PASSING GEAR CUTS OUT. MY VEHICLE HAS BEEN IN THE SHOP MANY TIMES AND IS IN THE SHOP NOW. I HAVE A DEEP CONCERNED FOR THE SAFETY PERFORMANCE OF THIS VEHICLE FOR MYSELF AND MY FAMILY.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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