GMC Yukon engine failure problems

Filed Nov 3, 2026 · Engine · NV

My brother and I were on our way home from Phoenix to Las Vegas, driving about 70 mph when my 2022 GMC Yukon Denali suddenly shifted into neutral. We pulled over and had to restart the vehicle. We started driving again and a few minutes later the car shifted into neutral for the second time. We pulled over, restarted the car, drove for about a minute and it happened a third time. There was complete loss of control of the vehicle, thus we had no choice but to pull over again. The vehicle completely seized up and would not start again. The car issued a warning stating, “hot oil temperature.” It then issued another warning, stating “low battery,” though all the lights and power were working. The car issued available for inspection at Liberty GMC in Phoenix where I had to have it towed by my AAA. We then had to rent a U-Haul to retrieve the items stuck in the back of my car, which was our reason for the trip in the first place. This situation put us in a dangerous and very unsafe position, as it was dark outside and we had no choice but to maneuver to the side of the road quickly, as cars were flying by on the highway. The engine failure has been confirmed by Liberty GMC, where the car is still sitting and awaiting engine replacement. The vehicle has only been inspected by GMC service at Liberty GMC, to my knowledge. There were no warnings prior to failure. The warnings I mentioned above only happened after the fact.

Filed Nov 2, 2026 · Engine · GA

Car with $13000 miles had sudden engine failure. Have heard numerous other new Yukons have had this issue.

Filed Oct 30, 2026 · Engine · NJ

Engine Failure. While driving on the highway at a speed of approximately 70 mph the engine made a noise and the vehicle lost power. The safety factor is that i was on the highway with trucks and busses in which i had to coast the vehicle to the shoulder of the road and call for police assistance. No warning lamps. Vehicle was towed and inspected by the dealer in which i was informed that the engine bearings had locked up. The vehicle needed a new engine.

Filed Oct 28, 2026 · Fuel system · NC

While stopped in a parking lot. I returned my vehicle to drive home, and the car would not start. I had it towed to the dealer. They did a diagnostic inspection for "crank-no-start ". Two trouble codes: P0340 intake single camshaft ignition sensor circuit and P00C6- fuel rail pressure load during engine cranking. Performed diagnostic checks and suspect a broken timing chain and timing tensioner that causes the bottom of the engine to free spin while the top 0.5 does not. These engines are known as interference engines, and anytime there is a mismatch between the top 0.5 and the bottom 0.5, there is the potential for catastrophic failure due to the design of the valve train and bottom 0.5 of the engine. The technician suggested a full engine replacement. I went to the dealer and spoke with the Service Manager, Greg, and he stated that he would reach out to GMC because the VIN number was not part of the recall, although the YEAR/MAKE/MODEL is. I also reached out to GMC to open a claim. To date, I have not heard back, and they have not yet accepted responsibility for replacing the engine.

Filed Oct 20, 2026 · Engine, Transmission · PA

VEHICLE: 2021 GMC Yukon, 5.3L V8 (L84). VIN: [XXX]. Mileage at failure: approximately 88,000. Component: Engine. INCIDENT DATE: XXX While I was driving on a highway, the engine began to misfire and I heard a ticking noise. The check engine light then began flashing, indicating a severe misfire. I pulled off the highway immediately to a rest area. The vehicle was towed to a GMC dealer. The dealer's diagnosis suspected failed valve lifters, and the repair orders call for a misfire diagnosis with the Bank 1 cylinder head removed, and replacement of the camshaft, lifters, and related parts. This failure caused sudden loss of engine performance at highway speed. The engine began smoking. My family and I were in the vehicle, and we were fortunate there was a safe place to stop. I believe this is a known defect. GM Service Bulletin PIP5776, "Misfire Due to Collapsed Lifter," covers 2021 GMC Yukons with the 5.3L L84 engine. It describes a misfire with a bent pushrod leading to a collapsed lifter or a lifter that comes apart, and it attributes the cause to an internal lifter concern. Many other owners of GM V8 trucks and SUVs have reported the same failure, and a class action over the AFM/DFM lifters has been pending against GM in federal court in [XXX] since 2021. I bought this vehicle new and have maintained it. This is the second time this vehicle has left my family stranded on a highway. In 2024, a separate known issue left us, including three children under [XXX], on the side of a major highway about 7 hours from home. GM repaired that issue. For the current failure, GM has not agreed to cover the repair. It has offered $5,951.39 toward an engine replacement, which would leave me responsible for $13,886.59 plus teardown labor. I am filing this complaint so the federal safety agency is aware of this failure, which can cause sudden loss of power on the highway. GM case number: XXX. Dealer: Fred Beans Buick GMC, [XXX]. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Oct 18, 2026 · Engine · IL

After the original engine failed the recall inspection, it was replaced as part of GM's recall program at 40k miles. At 50k miles with the new engine (so only 10k miles into the new engine), the engine completely locked up and shut down while my son was driving the car on the interstate. We had to get it towed to the nearest dealership, and two weeks later, we are still waiting on the engine to be replaced again under warranty. I have completely lost faith in this car as I will now be on my third engine in 50k miles, and it is very dangerous if this thing can just shut down again while driving as they clearly have not solved the issue of these failing engines.

Filed Oct 16, 2026 · Engine, Transmission · GA

Bought 2021 GMC Yukon Denali new. Transmission failed at 70,000 miles. Engine has now failed at 111,000 miles. Both diagnosed at Capital GMC Atlanta, GA. Cost to replace transmission $8k (GMC paid half). Cost to replace engine $12k (GMC offered no assistance). Engine failure not related to current engine recall/investigation on GMC 6.2L V8 engines. This failure was on the top vs on the bottom (current recall).

Filed Oct 16, 2026 · Engine · NY

Was operating Yukon on st route 5 doing 55mph when the Yukons engine blew up and the vehicle shut down on me in the middle of the road.

Filed Oct 13, 2026 · Electrical · 160,000 miles · AR

Odometer Fraud. The contact owns a 2018 GMC Yukon. It was discovered that there was a mileage discrepancy. The vehicle was a dealer sale. At the time of purchase, the vehicle mileage was 72,499. After three months, the vehicle experienced an engine failure, and a worker at a third-party automotive parts distributor and recycling center discovered that the original engine's mileage was 160,000.

Filed Oct 13, 2026 · Engine · PA

2024 GMC Yukon, L87 6.2L V8 VIN: [XXX] This complaint concerns the L87 6.2L engine and the federal safety agency Engineering Analysis EA26005 regarding engine failure following the remedy for Recall 25V‑274. My vehicle underwent the GM recall inspection, including the Pico test, and passed the inspection. The engine was therefore not replaced. Since completion of that inspection, I have continued to obtain abnormal used-oil-analysis results showing excessive and increasing engine wear metals. At the most recent oil change, I cut open the engine oil filter and found visible metallic swarf/debris embedded in the filter media. I have retained the oil filter media and have photographs documenting the metallic debris. I also have the previous oil-analysis reports documenting the wear-metal trend. The engine has now developed a loud knocking noise. Because of the knocking noise, documented abnormal wear metals, and visible metallic debris in the oil filter, I no longer consider the vehicle safe to operate due to the possibility of sudden engine failure and loss of propulsion. The significant concern is that this vehicle passed GM's Recall 25V‑274 screening procedure but appears to be developing the same type of internal engine deterioration that the recall was intended to identify and prevent. I am requesting that the federal safety agency associate this complaint with Engineering Analysis EA26005 and review this case as a possible post-remedy failure of the Recall 25V‑274 inspection procedure. Supporting evidence available includes: • Used-oil-analysis reports showing excessive and increasing wear metals • Photographs of metallic debris/swarf in the oil filter media • Retained oil filter and filter media • Dealer repair and recall records • Mileage and oil-change records • Current loud engine knocking noise The vehicle is presently not being driven because of the potential for engine seizure or sudden loss of propulsion. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)