GMC Sierra 3500 body problems

STRUCTURE

The contact owns a 2022 GMC Sierra 3500. The contact stated that the rear windshield frame was cracked, which allowed water to leak into the vehicle. The vehicle was not diagnosed or repaired by an independent mechanic or dealer. The manufacturer was made aware of the failure. The failure mileage was approximately 29,000.

NHTSA complaint #11752098 — an unverified report by a vehicle owner.

STRUCTURE:BODY

While traveling at highway speed, the hood-mounted air vent (factory-installed component) on my 2022 GMC Sierra 3500 HD suddenly detached from the vehicle without warning. Upon separation, the vent was propelled backward, striking both the hood and the windshield. The incident occurred during normal driving conditions, with no prior indication of looseness, damage, or defect in the component. The force of the detachment caused damage to the hood and posed a significant safety risk, as the debris impacted the driver’s line of sight and could have resulted in loss of control or injury. There were no external factors (such as collision or road debris) that contributed to the failure. This appears to be a failure of the factory-installed component and its mounting system. Safety Concern: This type of failure presents a serious hazard not only to the vehicle occupants but also to other motorists. A detached component at highway speed could strike nearby vehicles, cause sudden driver distraction, or lead to more severe accidents.

NHTSA complaint #11734559 — an unverified report by a vehicle owner.

STRUCTURE:BODY

Known defect with 2019 and now 2020 GMC sierra trucks. Design was updated for 2021+ which has corrected the seal failure defect. GM has issued a service bulletin to dealers about how to repair the problem. Back window is leaking water. Defective seal noted by GM. GM is only covering the cost of repair if. Vehicle is still under 3/36 warranty. If outside your warranty cost from dealer to owner is $2500 to $6000. A known design failure GM recognized and took steps to change the design for future. Vehicles but will not stand behind vehicles that have this defect. Would like the cost to the repair fall back to GM to cover. Bulletin # 18NA383 [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA complaint #11693845 — an unverified report by a vehicle owner.

STRUCTURE:BODY

Water leak at the rear window leading to mold growth. Continues to leak after repaired twice by dealership.

NHTSA complaint #11690071 — an unverified report by a vehicle owner.

STRUCTURE:BODY

Front wheel well liners keep falling out of place like they are melting. happens when towing and engine gets hotter than normal. Trailer is well below limit for vehicle. Liners fall onto the tire while in motion. This is the 4th time this issue has happened to my vehicle. Dealer replaces them and says it happens all the time.

NHTSA complaint #11687412 — an unverified report by a vehicle owner.

STRUCTURE

The contact owns a 2020 GMC Sierra 3500. The contact stated that while driving 45 MPH with passengers seated in the rear seats, the passengers became aware that water was entering the vehicle between the window and frame. There were no warning lights illuminated. The vehicle was taken to the local dealer, who informed the contact of Technical Service Bulletin: 18-NA-383. The vehicle was not diagnosed or repaired. The manufacturer was contacted and confirmed that there was no special coverage or warranty coverage on the vehicle. The contact was referred to the NHTSA Hotline for assistance. The failure mileage was approximately 50,000.

NHTSA complaint #11670439 — an unverified report by a vehicle owner.

STRUCTURE:BODY

Tail gate has opened twice while driving down the road.

NHTSA complaint #11658354 — an unverified report by a vehicle owner.

STRUCTURE:BODY

The Vader Chrome on the front of vehicle is peeling. This includes the grille and surrounding areas. This area has been inspected by a representative at GMC and at a dealership. GMC refuses to stand by their product.

NHTSA complaint #11648923 — an unverified report by a vehicle owner.

STRUCTURE:BODY

On at least 5 occasions, my inner tailgate has released itself and gone down during motion. This has been uncommanded. It appears GM has a recall for this but it does not include my truck. The dealership that looked into it agrees this is likely the same issue and GM should include it in the recall.

NHTSA complaint #11622341 — an unverified report by a vehicle owner.

STRUCTURE:BODY

There is a current safety recall N232426400 on GMC pickups including the year of my truck. GMC is saying that my VIN is not covered by the recall. However, I have the multi-pro tailgate and it came open about 6 months ago on its own as i was backing up and it caused me to run into my trailer with the tailgate. I put my tailgate up after moving my truck from under my trailer and then when i went to back up somehow the tailgate popped open and i didnt know and it contacted the top of tailgate while it was down.

NHTSA complaint #11605969 — an unverified report by a vehicle owner.

STRUCTURE:BODY

1 - the failed component is the tailgate. The tailgate lowers automatically without any input from me while the vehicle is in operation. It has happened three times since buying the truck in February 2024. 2 - During the third event, I was backing up my Airstream trailer into its storage building when the tailgate dropped. At that time, I was negotiating a sharp turn in reverse and the tailgate came in contact with my trailer's propane tank housing. Both the tailgate and the propane tank housing were damaged (see photos). 3 - It was not until recently that I learned of a recall for the same condition on other trucks like mine, but for some reason my truck doesn't seem to be included even though it has the same condition as those trucks that are included. The tailgate and my trailer have not yet been inspected by any third parties (manufacturer, police, insurance, etc.), and no repairs have been made yet. 4 - There were no warning signals (either visible or audible) that the tailgate was down while the truck was in operation.

NHTSA complaint #11600069 — an unverified report by a vehicle owner.

STRUCTURE:BODY

Rear window leaking on 2020 gmc truck due to faulty rear window seal and plastic slide. Known issue in 2020 models with a service bulletin already in place. Headliner saturated and black mold showing. Rear back liner has been saturated multiple times and gmc would not refund the cost of a whole new window to be put in and reimbursed. GM bulletin # is 18-NA-383

NHTSA complaint #11497794 — an unverified report by a vehicle owner.

STRUCTURE:BODY

Tailgate falls open while traveling down the road

NHTSA complaint #11446957 — an unverified report by a vehicle owner.

STRUCTURE:BODY

DASH IS CRACKING IN THREE SPOTS

NHTSA complaint #11387945 — an unverified report by a vehicle owner.

STRUCTURE:BODY

CRACKED DASHBOARD LOCATED BY AIRBAG

NHTSA complaint #11043662 — an unverified report by a vehicle owner.

STRUCTURE:BODY

I ALMOST RAN INTO ANOTHER CAR BECAUSE THE OTHER DRIVER STOPPED SUDDENLY AND I HAD TO PUMP THE BRAKES OVER AND OVER TO STOP WHEN THE RUSTED LINE BROKE. I WAS ON A CITY STREET DRIVING SPEED LIMIT AND WAS LUCKY TO BE ABLE TO STOP. I WAS TOWING MY TRAILER LAST WEEK AND ALMOST LOST THE TRAILER BECAUSE THE ENTIRE UNDERBODY IS RUSTED. I HAVE HAD SEVERAL TRUCKS AND NEVER HAVE SEEN THIS HAPPEN. IT WAS A SCARY SITUATION IN BOTH CASES.

NHTSA complaint #10864689 — an unverified report by a vehicle owner.

STRUCTURE:FRAME AND MEMBERS:UNDERBODY SHIELDS

BOUGHT A 1999 GMC SIERRA 3500 4DOOR 8FT. BED WITH 30000 MILES ON IT IN 2001. FIRST BRAKE LINE RUSTED OUT IN 2005. SECOND LINE FROM FRONT TO BACK RUSTED AND BROKE 2008. FUEL LINE RUSTED AND LEAKED GAS ALL OVER MY DRIVEWAY 2010. TODAY THAT SAME TRUCK? IS IN A REPAIR SHOP BECAUSE THE FRAME BY THE STEERINGBOX AND PASSENGER SIDE FRONT RUSTED AND CRACKED. ITS A SHAME GMC USED SUCH BAD MATERIALS FOR THEIR TRUCKS. MY TRUCK NOW HAS ONLY 97000 MILES ON IT. IF IT CANT BE FIXED SAFELY THE SCRAP YARD IS ITS NEXT STOP AND A FORD WILL TAKE ITS PLACE. TO BAD GMC YOU LOST ANOTHER CUSTOMER.

NHTSA complaint #10586534 — an unverified report by a vehicle owner.

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2008 GMC SIERRA SLT UNDERCARRIAGE IS RUSTING AWAY ALONG WITH ANY COMPONENTS ROUTED ALONG UNDERCARRIAGE SUCH AS BRAKE LINES, FUEL LINES, ECT. VEHICLE HAS BEEN KEPT IN A GARAGE ITS ENTIRE LIFE. THIS CONDITION IS EXTREMELY UNSAFE AND NEEDS LOOKED AT BY GMC AND CHEVY.

NHTSA complaint #10423785 — an unverified report by a vehicle owner.

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TL* THE CONTACT OWNS A 2007 GMC SIERRA 3500. THE CONTACT STATED THAT THE VEHICLE WAS BURNING OIL MORE RAPIDLY THAN NORMAL. THE MANUFACTURER WAS NOTIFIED AND INFORMED HIM THAT THE VEHICLE COULD BURN ONE FULL QUART OF OIL EVERY 1,000 MILES TRAVELED. THE DEALER RESEALED THE TURBO BUT TO NO AVAIL. IN ADDITION, WHEN DRIVING OVER ROAD BUMPS HE COULD HEAR THE DOORS SHIFTING INSIDE OF THE DOOR FRAME. THE MANUFACTURER ADVISED THAT THE FAILURE WAS NORMAL. THE DEALER MADE REPAIRS TO THE BODY BOLTS BUT THE FAILURE PERSISTED. THE DEALER ADVISED THAT HE SHOULD OIL THE DOORS TO REDUCE THE AMOUNT OF NOISE. THE FAILURE MILEAGE WAS 36,000 AND THE CURRENT MILEAGE WAS 58,000.

NHTSA complaint #10349934 — an unverified report by a vehicle owner.