2020 GMC Yukon Xl Complaints

ENGINE — Filed 06/22/2026

My family drove from [XXX] to [XXX]. Upon arrival check engine light came on, we proceeded to a local shop, by the time we arrive check engine light was flashing and engine was knocking and was clearly malfunctioning. Shop owner recommended we transport the vehicle back home as service shops in the area were experiencing high volume and parts shortages. We had vehicle towed to a local shop in [XXX]. The engine is giving diagnostic codes P0300, P050D, [XXX] with internal knocking and tapping. Vehicle has been kept current on all oil changes and has no external leaks. GMC wants at least $12,000 to replace the engine. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

POWER TRAIN — Filed 05/19/2026

Without any indications of a problem our transmission began making a loud whining noise. The evening before it was fine and the next morning on startup the noise just began. The Vehicle only has 45,000 miles on it and the transmission had been serviced at the recommend manufacturer interval. Took it immediately to my auto repair shop where it was diagnosed as a transmission failure (they has seen this before) and told not to drive until replaced due to safety issues related to the failure. Unfortunately, due to a shortage of these needed 10 speed transmission I waited over a month for the vehicle to be repaired. The shop contacted GM to inquire about any warranty help but was told there was none.

ENGINE — Filed 08/15/2025

The engine light came on and started making noise. We drove it to a mechanic shop, and they said the code stated camshaft and other component issues, but the engine ended up failing completely and was rebuilt. We initially checked for recalls and our VIN did not show any; however, we recently became aware that our engine (6.2L) might be part of the ongoing current problems associated with a recall. We are hoping that GMC will cover any remaining repairs and/or reimburse us for the thousands it has cost us.

SERVICE BRAKES,FUEL/PROPULSION SYSTEM — Filed 12/31/1969

Multiple repairs on brakes and tires are mismatched old since purchased in 2023 tires deflate gas cap missing

ENGINE — Filed 04/22/2026

Engine started with a rough idle, I attributed this to mileage. Check engine light did not come on until days before scheduling service. Per diagnostic from Chevrolet service department: Lifter roller damaged and camshaft damaged on lobe. need to replace camshaft and lifters. this has been diagnosed by Chevrolet dealer mechanics at Ferman Chevrolet North Tampa, in Tampa Florida. Check Engine Light came on 4 days before I took it for diagnostic. Chevrolet and GMC have issued a recall on 2021+ but this remains outside that recall. I'm quoted for an $11,343 repair on a vehicle that has gotten regular synthetic oil changes at the dealership since I bought it with approx 80k miles on it. Metal was not noticed in the prior oil changes, latest which was

ENGINE AND ENGINE COOLING — Filed 03/30/2026

The contact owns a 2020 GMC Yukon XL. The contact stated that while driving 70 MPH and attempting a lane change, the vehicle failed to accelerate as intended. The contact pulled over to the shoulder and restarted the vehicle, but the vehicle struggled to restart and failed to accelerate as needed. The vehicle was driven to the residence at a reduced speed. The contact referenced NHTSA Campaign Number: 25V274000 (ENGINE AND ENGINE COOLING); however, the VIN was not included in the recall repair. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was 70,000.

STEERING — Filed 03/16/2026

Driving on the highway when the steering warning light came on and then I had a loss of complete steering on the highway. Somehow was able to get off the highway but not completely off the road. Back end of the vehicle was still in harms way I could not turn that wheel at all this is a complete safety issue and could have easily caused an accident and could have been deadly. There was no warning before that just went out while driving at highway speeds on the highway. Also had to wait two hours for a tow. Vehicle is currently being diagnosed at the dealer and will provide all receipts once completed. This is an issue that needs to be addressed. Huge safety concen

ENGINE — Filed 10/10/2024

Lifters broke and destroyed the camshaft at 99,000 miles. Total repair cost $8,200.

ENGINE,ENGINE AND ENGINE COOLING — Filed 02/18/2026

The contact owns a 2020 GMC Yukon XL. The contact stated that while driving at 35 MPH, there was an abnormally loud ticking sound coming from the vehicle. The driver was able to pull over safely. There were no warning lights illuminated. The vehicle was towed to an independent mechanic who determined that the lifter was stuck in the bore, and there was a misfire in cylinder #7 due to a stuck camshaft. The local dealer was not contacted. The manufacturer was not notified of the failure. The failure mileage was approximately 113,997.

ENGINE — Filed 02/13/2026

My 2020 GMC Yukon XL Denali 6.2L with 59,000 miles developed a ticking noise and slight power loss diagnosed by three different garages as a "collapsed lifter" on #4 cylinder. It's one of the AFM/DoD cylinders that shuts down to save fuel. $8,000 repair estimate, or $12,000 if the failed lifter damaged the camshaft. All three garages said "we see a lot of these." Internet forums are loaded with lifter problems on this engine: specifically AFM/DoD lifters. Safety is not affected. Noise/diagnosis reproduced by three independent garages. Has not been inspected by mfg, police, or insurance rep. No warning lamps or messages, no ODB2 "codes" found by garages. Seven months ago the water pump exploded on Interstate 70, putting us at serious risk. Now this lifter trouble at 59,000 miles. Both should have been covered by the 60,000 mile powertrain warranty, but I'm beyond the 5-year limit.