GMC Sierra Complaints

15,732 consumer complaints on file.

#11735445May 4, 2026
STEERING, WHEELS
The control arm bearing appears to have failed without warning causing loss of steering control. This occurred at low speed on a street in [XXX] last night near a gas station, so the driver was able to drive to a safe location easily without risk to life. Had the failure happened at speed a possibly fatal collision would have been likely. The vehicle has been used for the past 8 months to drive to work and has not been subject to any stress. It has not been modified. The tow truck driver said he has seen a number of other control arm failures recently, not necessarily in the same vehicle type. It may be due to bad pot holes this year in [XXX] , they are bigger and deeper than normal. This information is based on assessment by tow truck driver last night. Vehicle is at Jim Shorkey in Murrysville for repairs 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
#11735449May 4, 2026
ENGINE AND ENGINE COOLING, FUEL SYSTEM, GASOLINE, POWER TRAIN
The contact owns a . The contact stated that upon restarted the vehcile experienced harsh restarts and lurch forward. The contact indicated that the failure and become more frequent. The vehicle was taken to the local dealer was unable to duplicate the failure and no service was performed. The manufacturer was notified of the failure.. The failure mileage was 33,400.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11735481May 4, 2026
STRUCTURE
The contact owns a 2021 GMC Sierra LD Crew. The contact stated that while driving on the highway at an undisclosed speed, the vehicle's bedrail attachment fully detached from the vehicle. The vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The failure mileage was unavailable.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11735522May 4, 2026
WHEELS
Dear Sir, I currently own a 2017 GMC Denali that had a potentially catastrophic failure with one of the alloy wheels that are on my vehicle. Mileage about 110,000 I recently went to have new tires installed on my vehicles when the tire shop manager came from the work area and said that he could not put a new tire on my one wheels. The reason the tire store could not put a tire on that wheel is because two of the spokes on the alloy wheel were broken. There were three spokes between the broken spokes. The are 12 spokes on the wheel and the two broken spokes were non adjoining. They were not next to each other. There were good spokes between the broken spokes. With a close inspection of the wheel there is no scuffing or impact damage to the wheel either on the outside of the wheel or the inside that would cause this failure. The spokes just cracked. The fact that the two broken spokes are not next to each other would seem to indicate that this was a manufacturing defect. I am writing to go on record of this failure of the alloy wheel on my truck. If someone would like to inspect the wheel, please contact me to arrange for a time to look at it. I have attached pictures of the wheel with the broken spokes. Regards, [XXX] You can see the cracked spokes at the 12:00 and 7:00 position on the wheel towards the center of the wheel. 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
#11735531May 4, 2026
ENGINE, ELECTRICAL SYSTEM, VEHICLE SPEED CONTROL
First occurrence was 02/27/2026 - onstar detecated a critical issue, the check esc, check tsc words came on in the center dash, then the orange lights came on and my truck went into limp mode at a stop light. I had to limp mode a mile to the nearest dealer. Where nothing was repaired just reset. Second occurrence - exhaust flap valve failed creating chirping noise resulting in a muffler replacement on 04/28/2026 - picked the vehicle up on 04/30/2026 Third occurrence - 05/01/2026 came out after a wedding to start my truck which it immediately repeated the first occurrence, check esc, check tsc with the orange lights and chugging. recorded on camera now the trucks been at the dealership awaiting updates.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11735558May 4, 2026
STRUCTURE:BODY
Driving on the highway and the top section of the grill (approx 4" x 50") broke loose and went over the cab of the truck. The piece didn't hit my truck or any other vehicle, but the driver behind me swerved to avoid it. All of the clips that hold the chrome piece to the vehicle are still attached to the body. I made contact with the local dealer's service dept. and was told my VIN was not in a recall for this issue. I contacted GM customer care and was told the recall hasn't been extended to my vehicle and that I would have to pay for the replacement. IF GM extends the recall to the other known issue model years I could be reimbursed. There seems to be numerous other complaints of this issue that aren't covered by GM.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11735643May 4, 2026
ENGINE, POWER TRAIN
Burnt engine oil, breakdown of viscosity, low oil warning light prior to required change, and oil consumption. Multiple events and oil changes with same results of oil fluid conditions and consumptions with low-mileage engine and overall vehicle.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11735668May 4, 2026
UNKNOWN OR OTHER
Electronic tailgate failed when driving uphill. Tailgate fell open
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11735336May 3, 2026
ELECTRICAL SYSTEM
Digital Dash cluster lost all communication and only has backlight, no speed, fuel gauges, anything what so ever. Can become extremely dangerous if driving down the road without the knowing of speed and other levels such as oil pressure and fuel.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11735377May 3, 2026
ENGINE
I have the GM 6.2 L engine in my 2022 Denali and had the recall Pico test performed August 20th 2025 and the truck passed, they changed the oil and cap and I was good to go supposedly. 5,000 miles later I had the oil changed again and everything looked fine, I drove the truck another approximately 1500 miles and the engine suddenly seized with no indications and no warning. That occurred on April 12th 2026. It is now May 3rd 2026 and I am still waiting for an engine.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11735386May 3, 2026
SERVICE BRAKES, ELECTRICAL SYSTEM, ENGINE
I am getting warning signs on the dashboard saying that my brake booster performance has failed and I need to service the brake booster , the brakes are very hard to press, I need longer stopping distances,and traction control and stability control towing harness my speed has been limited to 43 mph and it's saying that the mass air flow system is has low circuit
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11735396May 3, 2026
STRUCTURE:BODY
I was driving down the interstate and the hood valance blew off and hit my windshield
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11735397May 3, 2026
STRUCTURE:BODY
I was driving at 65mph through a construction zone on my local freeway - through a construction zone. With cruise control on, my upper bezel portion of my grill detached. It slammed into my windshield and hit the semi behind me after bouncing off the road. Luckily, neither of us swerved drastically. However, with workers in the area, this could have been a catastrophic event. After contacting my local GM dealership, I was told "yeah, that just kind of happens from time to time". When relaying that information to the GM Customer service team, they told me to ask for a courtesy credit from the dealership as I was out of warranty on bumper to bumper. There were no prior issues with this part on my truck that I was aware of leading up to this event. It additionally caused damage to my windshield and roof.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11735414May 3, 2026
ENGINE
We heard a knocking noise and took the truck to the nearest GM dealership. The engine had to be taken apart. The engine is a L87 6.2 liter V8. The GM dealership service department diagnosed camshaft damage that caused lifter failure. We have since been informed that GM has known about the failure of this engine for many years. In our case, we were fortunate that the engine did not fail when we were on the expressway. This is a huge safety issue. There were no warning lamps or messages from the vehicle, but we heard the knocking noise. We are facing a minimum of a 10,000 dollar repair and will not feel confident that this engine will not put our safety at risk in the future. We understand that the NHTSA has initiated an Engineering Analysis regarding this engine for the model years 2019 to 2021. (EA25007). We wanted you to have the information of another dangerous engine failure.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11735420May 3, 2026
TIRES:BEAD, TIRES:SIDEWALL, TIRES:TREAD/BELT
On March 14 2026 i was driving from [XXX] . To [XXX] to have my tires checked because i felt a strong vibration on my steering column and truck itself, it was getting worse so i took it to my mechanic who does my regular maintenance on truck. After inspecting Tire Goodyear Wrangler SR-A ( 275 55 R20) front passenger , mechanic informed me that the tire had separated from radial. And i need to get another tire right away, since there was non in stock we did the next best thing we took the front passenger tire the affected tire put it in the back and put the rear good tire up front. The next day i was on my way to purchase the replacement tire when the tire blew out. I was on a heavily traffic road [XXX] . I managed to take control of truck doing about 40 mph at the time and drove it off the road to a safer spot to look at damage. Well the passenger rear tire witch was originally on the front that had the separated radial blew a chunk out of the inner sidewall. I put on the spare and went and replaced the tire with another goodyear new tire. On march 28 as i was coming home from [XXX] Ca late at night the driver side rear tire blew as well again had to put on spare and next day took to local mechanics in [XXX] , and checked tire and again i was told that the tire separated from radial and that was the cause of blew out, they inspected all the tires at this point since this was the second tire from the same DOT set with less then 12000 miles that had separated. Well they found a third tire that had aldo separated and had a flat spot on driver side front tire, now there are 3 tires from the same set, coincidence, i dont think so i replaced the second and third tire. One the third day April 1, 2026 the passenger side front tire blew as well, now i have 4 tires that had radial separation with 2 that had blew out chunks from inner wall, with less then 12000 miles and less then a year old, in a mater of a month. 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
#11735423May 3, 2026
TIRES:BEAD, TIRES:SIDEWALL, TIRES:TREAD/BELT
On March 14 2026 i was driving from [XXX] . To [XXX] to have my tires checked because i felt a strong vibration on my steering column and truck itself, it was getting worse so i took it to my mechanic who does my regular maintenance on truck. After inspecting tire ( [XXX] 55 R20) was called over and shown that my front passenger side tire had a flat spot, it looked deformed mechanic informed me that the tire had separated from radial. And i need to get another tire right away, since there was non in stock we did the next best thing we took the front passenger tire the affected tire put it in the back and put the rear good tire up front. The next day i was on my way to purchase the replacement tire when the tire blew out. I was on a heavily traffic road [XXX] . I managed to take control of truck doing about 40 mph at the time and drove it off the road to a safer spot to look at damage. Well the passenger rear tire witch was originally on the front that had the separated radial blew a chunk out of the inner sidewall. I put on the spare and went and replaced the tire with another goodyear new tire. On march 28 as i was coming home from [XXX] late at night the driver side rear tire blew as well again had to put on spare and next day took to local mechanics in [XXX] , and checked tire and again i was told that the tire separated from radial and that was the cause of blew out, they inspected all the tires at this point since this was the second tire from the same DOT set with less then 12000 miles that had separated. Well they found a third tire that had aldo separated and had a flat spot on driver side front tire, now there are 3 tires from the same set, coincidence, i dont think so i replaced the second and third tire. One the third day April 1, 2026 the passenger side front tire blew as well, now i have 4 tires that had radial separation with less then 12000 miles and less then a year old, in a mater of a month. 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
#11735424May 3, 2026
TIRES, TIRES:BEAD, TIRES:TREAD/BELT
On March 14 2026 i was driving from [XXX] . To [XXX] to have my tires checked because i felt a strong vibration on my steering column and truck itself, it was getting worse so i took it to my mechanic who does my regular maintenance on truck. After inspecting tire ( [XXX] 55 R20) was called over and shown that my front passenger side tire had a flat spot, it looked deformed mechanic informed me that the tire had separated from radial. And i need to get another tire right away, since there was non in stock we did the next best thing we took the front passenger tire the affected tire put it in the back and put the rear good tire up front. The next day i was on my way to purchase the replacement tire when the tire blew out. I was on a heavily traffic road [XXX] . I managed to take control of truck doing about 40 mph at the time and drove it off the road to a safer spot to look at damage. Well the passenger rear tire witch was originally on the front that had the separated radial blew a chunk out of the inner sidewall. I put on the spare and went and replaced the tire with another goodyear new tire. On march 28 as i was coming home from [XXX] late at night the driver side rear tire blew as well again had to put on spare and next day took to local mechanics in [XXX] , and checked tire and again i was told that the tire separated from radial and that was the cause of blew out, they inspected all the tires at this point since this was the second tire from the same DOT set with less then 12000 miles that had separated. Well they found a third tire that had aldo separated and had a flat spot on driver side front tire, now there are 3 tires from the same set, coincidence, i dont think so i replaced the second and third tire. One the third day April 1, 2026 the passenger side front tire blew as well, now i have 4 tires that had radial separation with less then 12000 miles and less then a year old, in a mater of a month. 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
#11735271May 2, 2026
STEERING, SERVICE BRAKES
Power steering pump failed when decelerating after 9500 miles. When power steering pump fails, power assisted braking also fails. Upon deceleration, I could not turn the steering wheel at all or stop the vehicle without extreme pressure on the brake pedal. I narrowly avoided impact with a concrete barricade at the entrance to a parking lot. GM issued a technical bulletin (DCS7112) on January 16, 2025 identifying the problem and failure and directing dealerships to replace the pump on inventory vehicles. No mention was made to repair or notify owners of the potential problem.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11735285May 2, 2026
ENGINE
Engine coolant control valve needed to be replaced. Special coverage (N252508341) was issued out by GM to fix this problem on 2021 GMC Sierra 1500 vehicles.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11735062May 1, 2026
ENGINE
Engine sudden loss of power. Wheels locked up and I skidded off the road.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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