2023 GMC YUKON Complaints

The brake system control module, engine control module, and vehicle stability control system have repeatedly failed across 24 months and 9 repair attempts at two authorized GMC dealerships in Tennessee. As of March 17, 2026 the vehicle has 27 active diagnostic fault codes including U160F and U1610 (brake system control module lost communication on both CAN buses), U1611 (engine control module lost communication), and C2A0A (vehicle stability control disabling inhibited). All components are available for inspection at Beaman GMC in Antioch, Tennessee where the vehicle currently remains in an undrivable condition. Safety risk: Vehicle has stalled on the highway with my family including young children in the car. Brakes have randomly engaged over 100 times with nothing around and also failed to engage when needed. Stability control is disabled. These are active safety failures confirmed by GMC's own diagnostic scans. The problems have been confirmed by both Darrell Waltrip GMC and Beaman GMC across 9 visits. GMC's own Technical Assistance Center (Case XXX) was involved and could not resolve the defects. The vehicle was returned with more active codes than at drop-off after 57 consecutive days in GMC custody. Two unresolved GMC safety recalls are open on this vehicle — L87 engine loss of propulsion (N252494003) and brake fluid leak detection failure — directly related to the reported defects. Warning codes have been present and documented since October 2023 beginning at 1,381 miles. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

What component or system failed or malfunctioned, and is it available for inspection upon request? The vehicle experienced a malfunction associated with a failed Over-The-Air (OTA) software update affecting electronic control modules. The (ECM), (BCM), and related electronic systems appeared to lose stability during operation. The vehicle attempted to reboot while being driven and displayed multiple system warnings. The vehicle is currently at the dealership and is available for inspection upon request. How was your safety or the safety of others put at risk?While driving, the vehicle began malfunctioning and attempting system reboots. The dashboard flickered, warning lights, and the vehicle exhibited unstable behavior. During a prior event, the vehicle experienced unintended acceleration and abrupt deceleration. This created a risk of loss of vehicle control, particularly in traffic. I have small children in this vehicle, and the unpredictable electronic behavior while in motion posed a significant safety concern. Has the problem been reproduced or confirmed by a dealer or independent service center? The dealership confirmed that a previous event was caused by a failed OTA software update. The vehicle has since malfunctioned again while driving and has been taken back to the dealership for further inspection. The dealership has acknowledged module instability and opened a TAK case with the manufacturer. Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? The vehicle has been inspected by GMC1 dealership. A case has been opened with GM Customer Care. No police or insurance reports. Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? 9 days prior to the first major malfunction, the check engine light illuminate. On April 1, the check engine light re-appeared and the vehicle attempted to reboot again while driving.

The panoramic sunroof on my 2023 GMC Yukon Denali Ultimate XL spontaneously exploded while driving westbound on I-20 on March 13. There was no impact from road debris, no vehicles ahead, no overpass, and no external cause. The failure sounded like an explosion or gunshot. Tempered glass shattered with the sunroof in the closed position, showering the interior with glass fragments. Five occupants were in the vehicle at the time. No injuries occurred, but the sudden explosive noise and shower of glass created an extreme distraction and safety hazard while operating the vehicle at highway speed. The incident could easily have caused a loss of vehicle control on the interstate. The component that failed is the factory-installed panoramic power sunroof glass, standard equipment on the Denali Ultimate trim. The vehicle was taken to Lugoff Chevrolet for inspection. The dealer confirmed the glass failure and submitted a request to GM for warranty or goodwill coverage. GM offered to cover only 10% of the repair cost, characterizing the failure as an out-of-warranty wear issue despite the spontaneous nature of the defect. There were no warning signs, cracks, chips, warning lamps, or any indication of a problem prior to the failure. The sunroof was closed at the time. The vehicle has been dealer-maintained with no modifications to the sunroof or roof structure. This is a known industry-wide defect. NHTSA has previously investigated spontaneous sunroof shattering and documented over 4,000 complaints. GM has acknowledged awareness of this issue in other GM vehicles and previously issued corrective actions for sunroof glass on the Buick Regal and Chevrolet Cruze. Other GMC Yukon owners have filed NHTSA complaints describing identical failures. The failed sunroof glass and vehicle are available for inspection upon request.

Months ago I took my car to the dealer for the engine failure recall and they said there were no issues and changed the oil to a higher viscosity oil. Today I was driving and my engine failed while turning onto a busy road and took multiple tries to get started. It finally started and the engine light was flashing. The dealer told me th flashing engine light was bad and to not drive at all. I pulled over and had it towed to the dealer. The engine light stopped flashing. The dealer said they pulled a code on the computer and would look at it. They had my car for a full day so far and have said they can't find an issue. I do not feel safe having my family in this car when the engine can fail and they say nothing is wrong. I am lucky that I wasn't hit at the location it failed at.

The vehicle has the L87 GM engine. It lost complete power and the engine seized up and would not start again. Fortunately I was able to roll into a neighborhood and get off the main road with no issues. The dealer has confirmed the seized engine and a replacement engine has been ordered with no ETA. There was no prior warning of the failure, besides a shuddering, like I was running out of gas, and then a lose of complete power.

The onstar module of my 2023 GMC Yukon has failed. This is a wide spread issue with recent model GMC's. There are thousands of reports of the same thing happenings. When an onstar module fails, the vehicle loses its safety features. No lane departure, no collision detection or pre-collision braking, no critical system checks. Even the gas and mileage components stop working correctly.

The contact owns a 2023 GMC Yukon XL. The contact stated that the vehicle was losing oil, and the engine was running rough. There was an abnormal burning odor after driving the vehicle. The vehicle received an oil change; however, two weeks later, the oil warning light illuminated. The vehicle was towed to the local dealer, where it was determined the oil level was approximately 2 quarts low, and another oil change was performed. The vehicle was not diagnosed or repaired. The manufacturer was not contacted. The failure mileage was approximately 70,000.

2023 Yukon XL Denali passed the pico scope changed to 0W40 and 3 months later stopped working in the middle of driving just completely shut down. Engine started to smoke had it towed to dealership and they removed my oil filter and found crankshaft bearings in the filter. Needs a new engine now. Bought it brand new only has 45,000 miles on it currently.

Was driving approximately 70 miles per hour on the highway. While driving the vehicle just stopped in the middle of the highway after going 70 miles per hour. Was unable to put car in park. Car just shut off. Four police cars had to surround car due to being stuck in the middle of the highway with my small child in the car. Took an hour to get a tow truck. Being told our engine is now completely shot.

2023 GMC Yukon XL 6.2L V8 experienced progressive engine defects starting in first year. At 7,445 mi (Jan 2023), first dealer visit for engine issues. At 10,315 mi (Apr 2023), Cyl 2 fuel injector failed (internally open), vehicle TOWED to dealer, replaced under warranty. At 14,982 mi (Aug 2023), identical Cyl 7 injector failure (internally open), replaced under warranty. Two identical failures on different cylinders within 15,000 mi indicates systemic defect. By 30,409 mi (Aug 2024), dealer performed engine decarbonization due to carbon buildup from fuel injection issues. Dealer recommended additional decarbs at 38,077 mi and 42,577 mi. At 56,028 mi (Mar 2026), engine suffered catastrophic failure: piston ring failure causing excessive oil consumption and engine destruction, requiring full engine replacement. This matches GM's known 5.3L/6.2L V8 piston ring defect (subject of $150M class action settlement). Defective injectors caused incomplete combustion, carbon buildup on piston rings, ring tension loss, and catastrophic engine failure. Vehicle also has unfixed suspension defect (camber bolt/alignment). Vehicle visited dealer 8+ times. Engine failure poses serious safety risk from sudden power loss at highway speeds. Vehicle available for inspection.