Home · 2021 GMC Yukon Denali Xl 1500 · Complaints

What 295 owners told NHTSA about the 2021 GMC Yukon Denali Xl 1500

These are the actual owner complaints behind this car’s reliability verdict, filed with the federal government, unedited. They’re unverified reports, not confirmed defects: read them as leads for your pre-purchase inspection, not a diagnosis.

All (295)Crash / fire / injury (9)Engine (156)Fuel system (52)Transmission & drivetrain (47)Engine & cooling (29)Electrical system (26)Airbags (18)Driver assistance (18)Steering (11)Brakes (7)Seats (6)

26 of 295 complaints match · Electrical system · clear filters · page 2 of 2

Dec 6, 2020SuspensionElectrical systemEngine

WE WERE COMING BACK FROM A TRIP WITH MY CHILDREN AND THIS VEHICLE WAS BARELY 2 WEEKS OLD WITH 0 MILES AND WE WERE ON A HIGHWAY WHEN ALL THE EMERGENCY LIGHTS ON THE DASH WENT OFF. IT WAS FLAGGING THE ELECTRICAL SYSTEM, THE ENGINE, THE BRAKES. HONESTLY ALL THE LIGHTS POSSIBLE WENT OFF. THE VEHICLE WAS LAGGING AND IT FELT FORCE WHEN WE PUSHED ON THE GAS. OUR HANDS WERE GRIPPING THE STEERING WHEEL TO KEEP IT IN LANE TILL WE COULD GET OFF.

NHTSA ODI 11378101

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Working with the data? Download all 295 complaints as CSV · fetched from NHTSA July 25, 2026

How to use these: a complaint is one owner’s report, filed voluntarily and published unverified. Patterns matter more than any single story. If several owners describe the same failure at similar mileage, put that system at the top of your pre-purchase inspection list. Back to the full 2021 GMC Yukon Denali Xl 1500 verdict →