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What 34 owners told NHTSA about the 2020 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 (34)Transmission & drivetrain (14)Engine (10)Brakes (3)Electrical system (2)Fuel system (2)Backup camera & sensors (1)Driver assistance (1)Electronic Stability Control (esc) (1)Engine & cooling (1)Seat belts (1)

2 of 34 complaints match · Electrical system · clear filters

Jul 3, 2026Electrical systemWheelsBrakes

Issue with the trailer brake system keeps coming up on my dash. I know a lot of other people have had the same issue keeps dinging will not stop causes me to get distracted while driving. Unable to use other features because of this distraction and safety issue. The safety issue needs to be fixed this is an effective product with so many people having an issue you need to do a recall. I did let Graff Chevrolet in Mount Pleasant Michigan no and I took a picture and showed them.

NHTSA ODI 11748158

Jul 9, 2023Transmission & drivetrainElectrical systemFuel system

Transmission slipping and damage

NHTSA ODI 11531159

Working with the data? Download all 34 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 2020 GMC Yukon Denali Xl 1500 verdict →