GMC Sierra Complaints (2021)

671 consumer complaints on file.

#11552483October 29, 2023
SERVICE BRAKES, ENGINE, STEERING
"Service parking brake" "steering assist is reduced drive with care" comments showed up on screen…check engine light on, truck shaking/ vibrating completely as if wanting to turn off this all happened while driving on the road and randomly happened…please help..very Concerned
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11548799October 7, 2023
EXTERIOR LIGHTING
Passenger headlight light fills up with moisture resulting in the HID module filling up with water and shorting out. The high beam starts flashing when you try to use your turn signal and eventually the headlights completely stop working. Is a known problem, but GM won’t do anything to help if you’re outside of the 3year/36,000 mile warranty. Currently unable to get a new headlight because of the on going strike.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11545524September 19, 2023
ENGINE
Lifters camshaft malfunction. Known issue with 2021 GMC Sierra 20,000 miles
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11545110September 18, 2023
ELECTRICAL SYSTEM
Tailgate opens when driving and when parked. I thought something must of hit the button on the dash the first time it happened but now it is constantly doing it on its own. It has damaged the hitch.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11540751August 25, 2023
SERVICE BRAKES
WHEN DRIVING HOME AFTER PICKING UP MY 2.5-YEAR-OLD AND 6-MONTH-OLD THE BREAKS FELT VERY ODD AND NOT RIGHT. WHEN I APPLIED THEM, IT FELT ROUGH TO APPLY AND THEN HEARD A NASTY SOUND COMING FROM THE REAR OFF TRUCK. I TOOK MY TRUCK IMMEDIATELY TOO THE DEALER AND JUST GOT THE PHONE CALL BACK THAT THE MASTER CYCLINDER FOR MY BRAKE SYSTEM NEEDS TO BE REPLACED. THIS VEHICLE HAS 22,500 MILES ON IT AND IT ALREADY NEEDS SOMETHING FIXED LIKE THIS IS PRETTY SCARY SINCE MY FRIEND JUST HAD IT HAPPEN TO THEM AND THEY GOT IN A MAJOR CAR ACCIDENT. THANK GOD I DIDNT HAVE TO PUT MY FAMILY THROUGH THAT. HAVING A BREAK FAILURE IS SOMETHING NOONE WANTS AND NOT WHEN THE VEHICLE IS PRETTY MUCH BRAND NEW STILL. THE DEALER HAS CONFIRMED THAT THIS IS A VERY RARE CODE IN TERMS THEY USED TO BE HAPPENING. THERE WAS NO WARNING LIGHT OR ANYTHING IT JUST HAPPENED THEN AS I WAS TAKING IT UP TO THE DEALER, I GOT THE SERVICE BRAKE SYSTEM ALERT ON MY DASH.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11537689August 10, 2023
ENGINE, FUEL/PROPULSION SYSTEM, POWER TRAIN
After having simple oil and filter, and engine and cabin filter replaced at Alpine Buick GMC in Colorado Springs, CO, I received my vehicle back and noticed a complete difference in performance. It hesitates when accelerating, stays low in every gear, and bounces, and I mean bounces hard, when shifting gears, especially slowing down. When slowing down, as it shifts to the next lower gear, it almost pushes the truck forward against me pushing the breaks. Then, when feathering to accelerate slowly, it almost bounces back up to speed, hesitating until I let off the accelerator pedal a little, and it immediately shifts to about 1000 rpm in gear. I have to push really hard for it to go up a gear, and when it does, it has lost all power. My vehicle doesn’t run right anymore after my service appt. I have brought it to my hometown dealership and they say it runs fine and nothings wrong. But there is something wrong with it.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11536829August 7, 2023
POWER TRAIN
Transmission shifting is at times confused causing the vehicle to jump forward shifting to first gear. It pushes your vehicle 2-5 miles an hr faster when slowing down. The transmission also does the opposite when letting off the accelerator, shifting fast to a lower gear slowing the vehicle down quickly in a jerking motion at times. I have an 8 speed transmission. GMC dealer is replacing my torque converter, stating this may fix the issue, but it is a safety concern.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11527661June 19, 2023
ELECTRICAL SYSTEM
My son got into the car to drive it and saw a black screen with a message that states “update failed, see dealer” and had multiple languages. Since that date, he has no GPS or backup cam, which he relies on as a new driver. Nothing at all in the info system works.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11526772June 13, 2023
POWER TRAIN
The owns a 2021 GMC Sierra 2500. The contact stated while driving 70 MPH, the RPM revved up to 6,000 RPM. Additionally, the vehicle lost motive power. The vehicle was taken to the dealer, who informed the contact that the transmission needed to be replaced. The vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was 47,000. The VIN was not available.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11526436June 11, 2023
UNKNOWN OR OTHER
I have HD surround vision cameras. I was parallel parking very slowly. The back end of my truck was in so I was watching the camera to see the front right of my truck and the back left of the other vehicle. I could see both vehicles including the road between them. There was space between the vehicles on the camera when I hit the other car. I called Sewell Buick Gmc and explained the camera might need calibrating. They sent a loaner car and picked mine up, When the driver arrived I explained the situation. It surprised his so I said get in my truck and put in reverse to activated the camera and watch me as I walk toward the right front tire. He saw mw as I approached, however, when I got right next to the tire I disappeared from she screen. GM said the vehicle was operating as designed. Operating as designed? They designed a SURROUND camera to show objects until they get next to the vehicle. Imagine if it was a toddler.
Crash:
Yes
Fire:
No
Injuries:
0
Deaths:
0
#11523697May 24, 2023
TIRES:TREAD/BELT
The right rear tire (Goodyear Wrangler 275/65R20) separated and blew out on the highway, the truck was very difficult to control however it was safely stopped and there were no injuries. There was no observed warning prior to the blow out. The tire separation caused damage to the right rear quarter panel. The spare was installed and finished the trip safely. A tire shop found a second tire with evidence of separation on the left front corner. The tire that blew out on the highway is (DOT PJOT JB1V 0721) and the other 3 including the one with evidence of separation is (DOT PJOT JB1V 0821). The blown tire has been returned to Goodyear in Ohio by the auto repair facility at Goodyears request. Goodyear is refusing to assess the other 3 tires unless I bring them to an authorized service center which is not possible with only 3 functional tires including the spare. The 3 remaining tires are at the auto repair facility.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11521259May 9, 2023
STEERING
Steering wheel stopped working
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11520989May 8, 2023
UNKNOWN OR OTHER
I have a GMC Sierra 2021 Denali. The vehicle currently has less than 16,000 mile and is at the dealership service department for lifter replacement. This is an extensive repair considering how new the vehicle with low miles. From extensive online research and collaborating with others, this is a common concern with multiple GMC vehicle that's been on GMC radar starting in 2017. GMC haven't yet issued a recall for these products and the consumers are footing the bills. Please put pressure on GMC to rectify their wrong.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11519962May 2, 2023
ELECTRICAL SYSTEM
While towing a new 2023 Airstream trailer on Interstate route 95 in New Hampshire my GMC Sierra truck driver display flashes a " check Trailer wiring" error message. When this message appears all brake function to trailer is lost makeing driving unsafe. The connection sometimes can intermittently and continuously reconnect momentarily and brakes reengage for seconds until they disengage again with repeated "check Trailer wiring" error message . Sometimes the brakes just disengage end never reconnect until error codes is cleared by GMC dealership. It's extremely unsafe to pull off exit and have trailer brakes reengage because they jam with high gain because vehicle brakes need to be applied very hard to over compensate for "NO" trailer brakes. GMC dealership has identified certain error codes with their computer but NO suggested fix!
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11519081April 26, 2023
ENGINE
The contact owns a 2021 GMC Sierra 1500. The contact stated that while driving at an undisclosed speed, the vehicle was shaking with the check engine warning light illuminated. The independent mechanic was made aware of the failure; however, the vehicle was not diagnosed or repaired. The contact stated that the independent mechanic had previously replaced the lifters, but the failure recurred. The manufacturer was not made aware of the failure. The failure mileage was approximately 20,095.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11518476April 22, 2023
STEERING
My 2021 gmc Sierra displays (service power steering with care) the truck only has 13184 miles and barely moves.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11517704April 18, 2023
TIRES:PRESSURE MONITORING AND REGULATING SYSTEMS
The contact owns a 2021 GMC Sierra 1500. The contact stated that the tire pressure warning light illuminated and that the TPMS sensor was not indicating the pressure for each tire. The vehicle was taken to the dealer and the dealer stated that no failure was found; however, the TPMS was reset, but the failure reoccurred. The vehicle was taken back to the dealer and the TPMS was reprogramed, but the failure persisted. The manufacturer was not contacted. The failure mileage was 5,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11517110April 14, 2023
SERVICE BRAKES, STEERING, ENGINE
While driving home from work around 6 am, my car had multiple warning lights and warning messages come up all of a sudden. Immediately after that I lost my power brakes and steering and was not able to control my car at 40 mph. I was lucky the light I passed was green and there was no other traffic. I was able to bring my truck to a stop after more than a quarter mile by putting all my weight on the brake pedal. The truck was towed to the dealer and has been there ever since.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11516713April 12, 2023
STEERING
I parked my car for about an hour after driving for months with absolutely no issues or warnings. When I started my car and went to pull off the steering wheel locked up and I couldn’t turn it. A message appeared on the screen saying: Service power steering drive with care, and an esc message. A light also appeared. I turned the car off and let it sit for an hour. When I started it again everything worked fine. My dealership won't do anything because the warning codes went away, and the vehicle is not included in any current recalls. When looking up this problem it appears there are multiple recalls for the exact same issue on other 2021 Yukon and Tahoe models but not the Sierra. Though I see many forums and threads complaining about the same problem on the Sierra's. Since it is the same vehicle and systems as the Yukon, shouldn't the same recall apply?
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11515885April 6, 2023
ENGINE
DRIVING DOWN THE HIGHWAY THE ENGINE STARTED SKIPPING AND STARTED BLOWING OUT BLACK SMOKE, AND QUIT RUNNING IN THE MIDDLE OF THE HIGHWAY. FOUND OUT THE HAD A FACTORY LIFTER DEFECT ON MY MODEL AND A SERVICE UPDATE WAS SUPPOSED TO BE DONE ON THE TRUCK CHANGING OUT THE LIFTERS HOWEVER EVEN THOUGH I HAVE GONE TO DEALERSHIP FOR ALL THE MAINTENANCE THE SERVICE HAD NEVER BEEN DONE OR TOLD TO ME. THIS COULD HAVE BEEN VERY DANGEROUS JUST ENGINE FAILURE THE SERVICE BY GMC N212353840
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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