GMC Sierra Complaints (2020)

626 consumer complaints on file.

#11421278June 17, 2021
SERVICE BRAKES, STEERING
While driving my 2020 GMC 2500 Denali with the Duramax Diesel engine, the power assist for the steering and brakes failed without any warning. This made the truck nearly impossible to steer and stop. Luckily, I was able to avoid a collision and get the truck stopped in a safe location. The truck is currently being towed to Rivard GMC in Tampa, Fl. Doing an internet search, I found this problem has happened to others as well. Please ask GM to rectify this extremely dangerous defect.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11420863June 14, 2021
ELECTRICAL SYSTEM
Service ESC, Service Power Steering, antilock brakes disabled all flashed on information center of vehicle. Service engine light, antilock brake light, ESC, low battery all illuminated. Vehicle would not start - try to start it would go through all issues on information center. This is the same ESC issue described for 2019 Silverado and GMC Sierras.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11418595May 26, 2021
SERVICE BRAKES, ELECTRICAL SYSTEM, POWER TRAIN
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.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11418617May 26, 2021
SERVICE BRAKES, ELECTRICAL SYSTEM
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.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11418621May 26, 2021
ELECTRICAL SYSTEM, SERVICE BRAKES, ENGINE
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.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11418543May 25, 2021
SERVICE BRAKES, ELECTRICAL SYSTEM, FUEL/PROPULSION SYSTEM
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.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11418260May 24, 2021
ELECTRICAL SYSTEM
The display for the backup camera and infotainment system became blank. Other owners have the same complaint. This is a serious safety issue because I was backing up when it went blank.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11418238May 23, 2021
SERVICE BRAKES, ENGINE, SUSPENSION
On Saturday, May 22, 2021, My wife was returning from fairgrounds in Waxahachie, TX. She remote-started the car, and the vehicle started. As it started to rain and was getting muddy, and the grounds are in a grass field (No large rocks, hills or debris to climb as it's cleared land), she shifted the vehicle into 4wd high incase the field was slick. She started to drive and received several warning lights, "Service ESC, Service traction control, brake light warning and check engine light". The vehicle also had a noticeable wobble to the wheel and felt off balance, jerky, and had speed limited. My wife turned the vehicle off and back on and some of the lights went off, and the vehicle did not lurch or wobble anymore. The vehicle had a tire changed at the dealer the day prior, so I am unsure if that tire change is related or not. Now the vehicle shows an alert "check engine, service emissions system". I am having the vehicle towed to the dealership tomorrow for diagnostics. All lights except the check engine light have since turned off since powering off the vehicle.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11417531May 17, 2021
AIR BAGS
Airbags failed to deploy after striking a street light pole head-on. The impact hit just right of dead center of the grille and shoved the front end back approximately 2 feet into the engine. There were no dash lights or warning lamps illuminated before the collision. I have notified GM and received a case number. I also have filed an insurance claim and the vehicle has been inspected by a reputable body shop and has been deemed a total loss. A police report was also filed. The vehicle is scheduled to be picked up by the insurance company on 5/18/21.
Crash:
Yes
Fire:
No
Injuries:
0
Deaths:
0
#11414681May 1, 2021
ELECTRICAL SYSTEM, STEERING, UNKNOWN OR OTHER
IT WAS FINE AND WE DROVE TO OUR NEIGHBOR, PARKED ABOUT 15 MINS. WHEN WE STARTED THE TRUCK TO TURN BACK, THE STEERING WAS SUPER HEAVY, WITH 2 MESSAGES POP UP ON THE DASHBOARD: SERVICES ESC, AND SERVICE POWER STEERING DRIVE WITH CARE. TRIED SEVERAL TIMES TO RE-START THE TRUCK, IT'S KEEP THE SAME. IN OUR NEIBORHOOD, PARROT TULIP VIEW, PFLUGERVILLE, TX 78660. RAINING ALL NIGHT, NOT SURE IF IT'S RELATED TO THE WEATHER.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11414107April 27, 2021
POWER TRAIN
TL* THE CONTACT OWNS A 2020 GMC SIERRA 1500. THE CONTACT STATED THAT UPON EXITING THE VEHICLE, HE NOTICED THAT THE VEHICLE WAS LEAKING AN UNKNOWN FLUID. THERE WAS NO WARNING LIGHT ILLUMINATED. THE VEHICLE WAS TAKEN TO SIMPSON BUICK GMC OF BUENA PARK (6600 AUTO CENTER DR, BUENA PARK, CA 90621) WHERE IT WAS DIAGNOSED WITH THE TORQUE CONVERTER NEEDING TO BE REPLACED. THE VEHICLE WAS REPAIRED HOWEVER, THE FAILURE RECURRED. THE MANUFACTURER WAS NOT INFORMED OF THE FAILURE. THE FAILURE MILEAGE WAS APPROXIMATELY 11,000. THE VIN WAS UNAVAILABLE.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11413341April 22, 2021
VEHICLE SPEED CONTROL
THE VEHICLE HAS MADE "PANIC STOPS" AT HIGHWAY SPEEDS 5 TIMES WHEN USING ADAPTIVE CRUISE CONTROL WITH NO INPUT FROM DRIVER OR SURROUNDING ENVIRONMENT I.E.. CLEAR ROAD, NO TRAFFIC, SUN OR NO SUN.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11413345April 22, 2021
AIR BAGS
TL* THE CONTACT OWNS A 2020 GMC SIERRA 2500. THE CONTACT STATED THAT UPON DRIVING OVER A HILL AT 45 MPH, A VEHICLE WAS STOPPED IN THE MIDDLE OF THE ROAD. IN AN EFFORT TO AVOID HITTING THE VEHICLE, THE CONTACT DROVE THE VEHICLE OFF THE ROAD AND INTO A CONCRETE CULVERT AT THE END OF THE RAVINE. THE AIR BAGS DID NOT DEPLOY UPON IMPACT. THE AUTHORITIES WERE CALLED TO THE SCENE AND THE CONTACT WAS RUSHED TO A LOCAL HOSPITAL VIA AMBULANCE. THE CONTACT WAS DIAGNOSED WITH FRACTURED VERTEBRAE THAT MAY REQUIRE POSSIBLE SURGERY. A POLICE REPORT WAS FILED AT THE SCENE. DUE TO THE ACCIDENT, THE VEHICLE WAS TOWED TO AN INDEPENDENT MECHANIC WHERE THE VEHICLE WAS REPAIRED. THE DEALER NOR THE MANUFACTURER HAVE YET TO BE NOTIFIED OF THE FAILURE. THE VEHICLE WAS REPAIRED AND SOLD. THE FAILURE MILEAGE WAS APPROXIMATELY 15,500.
Crash:
Yes
Fire:
No
Injuries:
1
Deaths:
0
#11406920April 7, 2021
SERVICE BRAKES
BRAKES SQUEAK. STARTED ABOUT 3000 MILES. I HAVE COMPLAINED TO DEALER SEVERAL TIMES.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11403691March 18, 2021
SERVICE BRAKES, STEERING
MY TRUCK TUESDAY MARCH 16TH HAD ME UPDATE SOFTWARE AS SOON AS I GOT TO WORK, AFTER IT WAS DONE I GOT OUT OF MY TRUCK AND IT WOULD NOT LOCK WITH PUSH BUTTON OR FOB. WHEN I GOT INTO MY TRUCK TO GO HOME 10HRS LATER IT MADE A BUNCH OF CLICKING NOISES AND AFTER A MINUTE IT SHOWED UPDATE COMPLETE ON SCREEN THEN STARTED. THE VERY NEXT DAY I DROVE BACK TO WORK WHICH IS 22 MILES. WHEN I TOOK MY TRUCK TO LUNCH THREE BLOCKS AWAY I HAD ESC SERVICE LIGHT AND SERVICE PARKING BRAKE ACCOMPANIED BY CHECK ENGINE LIGHT. I CALLED LOCAL DEALERSHIP TO GET IT LOOKED AT AND THEY SAID FRIDAY WAS AS EARLY AS I COULD GET IT IN. I LEFT WORK EARLY AT 1:30 AND TRIED TO DRIVE IT AND IT WAS SQUALENE LIKE A BAD POWER STEERING PUMP AND SHAKING AS I DROVE. I WENT AHEAD AND TOOK IT THE DEALER.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11400111March 10, 2021
SERVICE BRAKES, FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING
2020 GMC SIERRA SLT VIN:[XXX] 15,700 MILES. BRAKING SYSTEM FAILURE AT ABOUT 45MPH ON HIGHWAY 78 IN LOGANVILLE, GA APPROACHING AN INTERSECTION WITH RED LIGHT, VEHICLE SEEMED TO LOOSE ALL POWER BRAKING. I STOOD WITH ALL I COULD ON THE PEDAL, AND TURNED TO AVOID REAR ENDING STOPPED VEHICLES, RUNNING INTO MIDDLE OF THE INTERSECTION BEFORE IT STOPPED; NO ACCIDENT ! DEALER IS REPLACING MASTER CYLINDER AND BOOSTER BRAKING SYSTEM, ALONG WITH COMPUTER SYSTEM UPGRADE. MY CONCERN IS THE DEALERSHIP AND NHTSA IS AWARE OF THIS ISSUE, YET NO CEASE AND DESIST DRIVING DIRECTIVE HAS BEEN ISSUED ! INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6). *TR
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11397930February 25, 2021
ELECTRICAL SYSTEM, STEERING, UNKNOWN OR OTHER
WHEN STATIONARY AND PREPARING TO START VEHICLE INTERMITTENTLY SEE "SERVICE STEERING COLUMN LOCK" MESSAGE APPEARS AND DISAPPEAR ONCE VEHICLE IS STARTED. THIS WAS PREVIOUSLY SUPPOSED TO BE ADDRESSED WITH SERVICE BULLETIN 20-NA-21 HOWEVER BEING TOLD BY SERVICE DEPARTMENT THAT VEHICLE HAS ALL CURRENT UPDATES APPLIED A YEAR AGO, INCLUDING THE ONE THAT SHOULD OF ADDRESSED THE ISSUE. TOLD THAT THE VEHICLE HISTORY SHOWS RECORDS OF PAST "LOSS OF COMMUNICATION TO DIC" BUT AS THEY CAN'T IMMEDIATELY REPRODUCE NO ACTION WAS TAKEN.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11397727February 24, 2021
EXTERIOR LIGHTING, UNKNOWN OR OTHER
DANGEROUS VISIBILITY HAZARD WHEN BACKING UP VEHICLE AT NIGHT. INFOTAINMENT SCREEN SWITCHES TO "FULL BRIGHTNESS" WHEN BACKUP CAMERA IS ACTIVATED, RESULTING IN BLINDING LIGHT TO DRIVER. DRIVER CAN NOT BACKUP SAFELY WITHOUT PHYSICALLY COVERING THE SCREEN TO REGAIN VISIBILITY. SCREEN BRIGHTNESS REFLECTS OFF ALL 4 WINDOWS, WINDSHIELD AND BACK GLASS. SIDE MIRRORS ARE UNUSABLE IN THIS CONDITION. THERE WAS A FIX FOR THIS ISSUE ON PREVIOUS GM MODELS, (PRIOR TO 2018), HOWEVER NO FIX FOR 2019 - PRESENT
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11397032February 19, 2021
ELECTRICAL SYSTEM:ADAS:BLINDSPOT:SENSORS
TL* THE CONTACT OWNS A 2020 GMC SIERRA 1500. THE CONTACT STATED WHILE DRIVING, THE SIDE VIEW MIRROR'S BLIND SPOT ALERTS ON BOTH SIDES ENGAGED WITH NO VEHICLE NEARBY. THE VEHICLE WAS TAKEN TO TURNER BUICK GMC (612 E MAIN ST, NEW HOLLAND, PA 17557) WHERE THE CONTACT WAS INFORMED THAT THE SENSORS WERE DIRTY. THE CONTACT THEN WASHED THE VEHICLE HOWEVER, THE FAILURE RECURRED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER HAD NOT BEEN INFORMED OF THE FAILURE. THE FAILURE MILEAGE WAS APPROXIMATELY 400. THE VIN WAS NOT AVAILABLE. *BF
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11396914February 19, 2021
TIRES
TL* THE CONTACT OWNS A 2020 GMC SIERRA 1500 EQUIPPED WITH BRIDGESTONE TIRES, TIRE LINE: ALENZA A/S 02, TIRES SIZE: 275/50/R22, DOT NUMBER: UNKNOWN. THE CONTACT STATED THAT THE TIRES FAILED TO HOLD THE TIRE PRESSURE. THE VEHICLE WAS TAKEN TO SCENIC CHEVROLET BUICK GMC CADILLAC (2300 ROCKFORD ST, MT AIRY, NC 27030) WHERE THE VEHICLE WAS PURCHASED. THE TECHNICIAN ADDED NITROGEN GAS INTO THE TIRES HOWEVER, THE FAILURE PERSISTED. THE CONTACT STATED THAT A LETTER WAS SENT TO THE MANUFACTURER HOWEVER, THERE WAS NO RESPONSE. THE FAILURE MILEAGE WAS 2,976. *JS *JS
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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