GMC Sierra Complaints (2023)

567 consumer complaints on file.

#11630238December 11, 2024
ENGINE
Failing coolant control valve causing reduced acceleration warning and engine overheating. Replacement parts unavailable from GM. Vehicle has been at dealership for a month and showing symptoms sporadically since the first few thousand miles getting increasingly worse over time. Reduced acceleration caus d many unsafe incidences when on the highway.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11629106December 5, 2024
SERVICE BRAKES
While driving on the highway a message came up stating Brake System Failure, top speed 62 mph. It also came up with other error messages, like service traction control. I completely lost any braking capability and had to let it slow down & pull off to the side of the highway. I shutoff the vehicle and then restarted it & everything seemed fine. I took it to the dealership right away, where they said it had about 20 communication codes across different systems. After 3 days of them having it, they have no idea what is going on. They are now test driving my truck to see if they can get it to happen again (which could kill someone if it does happen again).
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11628827December 4, 2024
ENGINE
Coolant control valve failure. The 3.0 Duramax Diesel engine coolant control valve is known for failure. The part is not available and it has no availability time frame from GM. Vehicle goes into reduced acceleration mode hindering driver from being able yo accelerate safely in traffic.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11628858December 4, 2024
ENGINE
Coolant control valve has failed. Part is back ordered and availability unknown. Truck goes into reduced power mode which makes merging into traffic unsafe.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11628550December 3, 2024
FUEL/PROPULSION SYSTEM
Engine stops running due to a known problem with GM's Fuel Pump Control Module. The unexpected shutting off of the engine poses a serious risk to passengers and other vehicles while operation on all roads. There are numerous vehicles in the service centers of all GM dealerships with the exact same failed part. The three month backlog on receiving parts is indicative that GM knows about this problem and has not issued recalls.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11627572November 26, 2024
UNKNOWN OR OTHER
This vehicle has an electronic tailgate release mechanism. This is the 1/2 ton version of GMC ‘s pickup. The tailgate releases randomly and opens, generally while driving down the highway. I have dump the contents of the truck bed on the road immediately in front of vehicles which are behind me, causing serious handling and collision issues for the trailing vehicles. No accidents have occurred yet. When I have called the GMC dealer, they inform me that the electronic tailgate release mechanism HAS BEEN RECALLED ON OTHER GMC TRUCKS for this EXACT reason but NOT for my model. While they will repair the device if they can get it to fail in the shop(which it wont), they will NOT replace it under warranty because it has not been recalled. How can this be?? It is clearly a recall issue and should be included in the recall program.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11625878November 18, 2024
STRUCTURE:BODY
UNKNOWN. While I was driving down the interstate going 75MPH the top part of my grill flew off cracking my wondshield. I pulled over and pick it up and all the plastic welded factory clips broke off. This is a seriously dangerous issue that should be recalled and covered by GMC
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11626003November 18, 2024
STRUCTURE:BODY
My 2023 Sierra has an issue with the tailgate opening at any given time while in park. The dealer denied such issue until I noted a GM recall on the tailgate switch becoming contaminated with water. My issue is the amount of items, such as tools, half full plastic gas cans, shovel, etc, that I have lost out the rear of my vehicle endangering other motorists. My tailgate has become damaged, mostly paint damage, however I am more concerned about the public's safety and other GM trucks with the same growing issue. It was not until my dead battery (in a 2023 vehicle) caused me to discover the tailgate issue was connected to the short in the release switch. I also have a tonneau cover so I cannot see the tailgate and the truck gives no indication of the tailgate being down. This problem began within a few months after purchase.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11625329November 14, 2024
POWER TRAIN, ENGINE
I was driving on the interstate and had just exited to refuel. As I was re-entering traffic, I accelerated to merge, and suddenly, as I was about to pull in, I felt and heard a massive metallic crash, like the entire transmission had dropped. The engine sounded abnormal, and immediately, the dashboard flashed a warning: 'Engine Power is Reduced.' The check engine light came on, and I got messages saying the transmission needed service and to schedule an appointment. I called my dealership and took it in as soon as possible. After they held the truck for a while, the service manager told me a critical part was on indefinite backorder with no fulfillment date. He handed back my keys, saying they'd reach out when it arrived. I asked if it was safe to drive, and he said yes. Later, driving from Illinois to California, my truck malfunctioned again. This time, in heavy, 12-lane traffic, the same loud crash threw me forward, almost slamming my face into the steering wheel. My wrists and shoulders hurt from bracing myself, and my right shoulder still aches. Again, I got the 'Engine Power Reduced' warning and transmission service notice. Each time, this has put me and those around me in severe danger.
Crash:
No
Fire:
No
Injuries:
1
Deaths:
0
#11624404November 10, 2024
ELECTRICAL SYSTEM, SERVICE BRAKES, EXTERIOR LIGHTING
I have been trying since day one of my brand new 2023 Sierra Denali pickup truck hence I spent a $100 K plus OEM accessories at the dealer ! This complaint is in reference to the safety part of the brake trailing that disconnect and lose light and brakes ! I have Spent insane times at the dealers and have complained to the GMC Executive offices with Nothing but excuses and Absolutely Zero Help from GMC Cooperate but continue to go make appointments at the dealers ! This is Safety complaint and they are not taking this seriously at all ! There is defiantly a ongoing issue with either the computer onboard or the trailer Module ! I am not a engineer but again this is a safety Issue that needs to be looked at ASAP ! I do not feel safe driving the truck !
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11624238November 8, 2024
ELECTRICAL SYSTEM
The contact owns a 2023 GMC Sierra 1500. The contact stated while driving 65 MPH with the cruise control engaged, the instrument cluster was blinking and then went black. The contact stated that the failure was intermittent but had become a recurring failure. The contact also heard a chirping sound when the instrument cluster went black. The contact had taken the vehicle to a dealer and was informed that there were no failures with the electrical system. The contact was unsure if a diagnostic test had been performed. The vehicle was not repaired. The manufacturer was informed of the failure. The failure mileage was approximately 56,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11623928November 7, 2024
ENGINE
While driving my 2023 GMC Sierra 1500 Denali, 6.2-liter engine on the highway, the engine seized at 22,000 miles. GMC has been working on my truck since 9/7/24 and still no truck. The end state is, I was told by the Service Department that there is a design flaw with the 6.2-liter engine (something with the intakes valves being too large, resulting in the valve bending seizing the engine). I was also told, this dealer had two other trucks there now with the same seized engine. Their plan is to install a new engine with the same design flaw with the hopes it does not happen again. This was an extremely unsafe condition as I was travelling at 65 miles per hour on the highway when the engine seized, luckily, I was able to coast to a large shoulder after almost getting into an accident when it seized going uphill.
Crash:
No
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
#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
#11621449October 23, 2024
LATCHES/LOCKS/LINKAGES:TRUNK LID:LOCK
The contact owns a 2023 GMC Sierra 1500 equipped with a Roll-N-Lock tonneau cover. The contact stated that the tonneau cover failed to lock and latch securely since the vehicle was purchased brand new. The vehicle was taken to the dealer, where unknown repairs were performed; however, the failure persisted. Additionally, the contact stated that the latching part of the tonneau cover was missing an inch-long piece. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was unknown.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11620652October 18, 2024
BACK OVER PREVENTION
The contact owns a 2023 GMC Sierra 2500. The contact stated that while the vehicle was in reverse(R), the split-screen view of the overhead of the vehicle and the rear of the vehicle were distorted or was not showing an image on the display screen. The contact stated that the failure was intermittent but was a recurring failure. The contact had taken the vehicle to a local dealer, where it was diagnosed and determined that there was no failure of the camera found. The contact stated that the dealer had removed and re-installed the camera. The vehicle was repaired; however, the failure reoccurred. The manufacturer was informed of the failure. The contact researched online and related the failure to TSB Number: 23-NA-169. The failure mileage was approximately 35,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11619002October 9, 2024
STEERING
While at highways speeds, the steering will not return to center while going/coming out of a curve. It acts as if the power steering system is failing or low on fluid but that is not the case. I’m aware of a current recall with the Sierra but my VIN does not fall into the recall. The recall is for a software fix. GMC will not look into without charging me. This is a safety issue while driving. It holds the steering wheel in the turning position and I have to pull it to center.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11618679October 8, 2024
STRUCTURE:BODY
Tailgate dropped while driving on the freeway. I was towing a utility trailer at the rime and the Tailgate hit the hitch area and scratched the Tailgate. It also dropped when not towing anything. I am leary to haul anything in the back of my truck
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11618611October 8, 2024
ENGINE
Defective valve body We took in our vehicle for issues with the engine. We were not able to drive it over 50 mph it only has 22,000 miles. The dealership has had the vehicle since August 13th. They have had the vehicle for 9 weeks. They said that neither them or customer [XXX] (CASE # [XXX]). Can locate a valve body, to replace the defective one. We were made aware that we had an issue when our check engine light came on. We proceeded to have a diagnostic done thru on-star. Then immediately took it to the dealership for repair. 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
#11615901September 23, 2024
TIRES:PRESSURE MONITORING AND REGULATING SYSTEMS
The contact owns a 2023 GMC Sierra 3500. The contact stated while driving at various speeds and hauling a 2023 Merhow Horse trailer, the TPMS became inoperable and could not read the trailer tire pressure. The vehicle was taken to the dealer, where it was diagnosed and determined that the failure occurred due to the TPMS sensor location and range. The dealer informed the contact that the TMPS sensor was losing the WI-FI connection because it was located behind the license plate, and the TMPS sensor was designed with a 23-ft. range. The vehicle was not repaired. The manufacturer was notified of the failure and referred the contact to the NHTSA Hotline for assistance. The failure mileage was approximately 7,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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