GMC Complaints

Vehicle started making a knocking noise. Made a service appointment. While on the highway, engine suddenly died causing the vehicle to shift into neutral. After stopping on the shoulder, vehicle locked into Park and would not shift back into neutral or start again for tow truck driver. Towed to nearby dealer who said the engine is beyond repair and has to be replaced. Estimated time to get engine and replace is 4 to 6 weeks.

• While driving a loud popping and clicking noise started coming from the engine and the truck started shaking. The vehicle is available for inspection • It was a busy two lane road and I had to continue about 30mph under the speed limit to safely get off the roadway • upon start up the engine clicks and pops with rough idle and the truck shakes. A mechanic looked at it and stated it sounds like a lower rod bearing noise • No further inspections have been done • A Service ESC warning popped up when the engine started making noise during the incident. The truck had been taken in twice for rough idle and engine noises prior to 100k miles, but the dealership stated that the noise and feel was normal for the 6.2L engines

275/65R20 - Goodyear Wrangler. This is the tire that came with the vehicle. It had approximately 32,000 miles. The tire separated and exploded. We installed the spare but one of the other tires is getting ready to explode. This is not normal wear and tear. This is out of the ordinary that tires on a new vehicle explode. We were on [XXX] when this happened. This tire is a death trap. This is forcing us to replace all 4 tires because we do not know what is going to happen. The dealership (Jerry Seiner) will do NOTHING. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

OnStar telemetry module failed. Needs replaced. These modules are on back order. Safety features and emergency calling are disabled due to failed telemetry modules. Over the air updates cannot be completed due to the failure of the telemetry system. Important module updates from the manufacturer are not happening.

While driving at night, a low oil pressure warning light illuminated on the dashboard. The following morning, I checked the oil level using the dipstick, which indicated a normal reading. Based on this, I proceeded to drive the vehicle. Shortly after departing, the engine began knocking severely. I immediately stopped and returned home. The vehicle was towed to a GMC dealership for diagnosis. The dealership determined that the engine had experienced catastrophic failure and required complete replacement. I was quoted $11,000 for the repair.

My vehicle began exhibiting symptoms consistent with a failed Engine Coolant Flow Control Valve. The check engine light illuminated, and diagnostic testing indicated a fault related to the coolant control valve system. In addition, I experienced abnormal cooling system operation, including the engine cooling fans continuing to run after the vehicle was shut off. Vehicle was tested few times in Auto Zone These symptoms affected the normal operation of the vehicle and are consistent with the condition described in Special Coverage N252508341. Based on the diagnostic findings and vehicle symptoms, I believe my vehicle qualifies for coverage under this program. I respectfully request that my vehicle be inspected and evaluated under Special Coverage N252508341 and that any eligible repairs be performed according to the terms of the coverage program.

The contact owns a 2013 GMC Terrain. The contact stated that the metal base of the seatbelt of the driver side has become exposed. The contact stated area looks frayed and deteriorated. The contact stated that is coming apart and has affected the seatbelt function. The local dealer was not contacted about the failure. The manufacturer was not made aware of failure. The failure mileage was approximately 177,000.

The contact owns a 2024 GMC Sierra EV. The contact stated that while operating the vehicle the front trunk had erroneously opened. During the failure the vehicle would not shift out of the park position and the warning message indicating that the door was unsecured had displayed. The contact indicated that the failure had occurred on multiple occasions and the battery was disconnected to reset the system and correct the failure. The cause of the failure was not determined. The manufacturer was notified of the failure. The local dealer was not yet contacted. The failure mileage was 15,000.

The recall repair for the brake vacuum pump did not hold for this vehicle. Even after the repair, several years later, the brakes would get hard as a rock, especially at low speeds and there was difficult stopping the vehicle. Due to the special Warranty on this recall, I was able to get the brake vacuum pump replaced at no cost. However, the recall repair failed initially. This is a safety issue.

Vehicle has experienced multiple electrical and mechanical failures at unusually low mileage. Purchased at 32,000 miles. At approximately 50,000 miles, the factory radio/infotainment system failed completely. Electrical systems were observed remaining active after the vehicle was powered off, suggesting an underlying electrical fault. At approximately 60,000 miles, the power steering rack and fuel pump both required full replacement and were confirmed and replaced by an authorized dealership. No warning lights appeared prior to these failures — components failed without any prior indication. At approximately 100,000 miles, the transmission began failing and exhibits the known torque converter shudder issue widely reported on this vehicle platform. The shudder was present prior to full transmission failure symptoms appearing. The pattern of premature failures across multiple unrelated systems — electrical, steering, fuel delivery, and transmission — suggests a broader manufacturing defect.