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Engine And Engine Cooling
01/01/2026
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.
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Engine
03/20/2026
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.
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Power Train, engine, fuel/propulsion System
03/06/2026
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 ring...
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Power Train, fuel/propulsion System
12/26/2025
High pressure fuel pump housing failed and filled the cabin with fumes. Rendered the the Yukon unsafe to drive with fuel flooding the engine compartment. Took the dealer 57 days to repair the car. No warning lights, only indication was the fumes in the cabin.
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Power Train
03/02/2026
Transfercase was casuing the Yukon to serge when in auto mode. No codes warning lights were presented. The dealer did not find any codes but when the transfer case was removed the oil was drained to which metal shavings were found in the oil. After getting the Yukon back the transmission began to exibit the same type of issues. Currently the Yukon is back in the shop.
