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What 17 owners told NHTSA about the 2018 GMC Sierra Denali

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 (17)Crash / fire / injury (1)Engine (5)Body & structure (4)Brakes (4)Lights (3)Steering (3)Electronic Stability Control (esc) (2)Transmission & drivetrain (2)Suspension (1)Wheels (1)

1 of 17 complaints match · Suspension · clear filters

Jun 21, 2020SuspensionBody & structure

THE REAR END MAKES NOISE WHEN TURNING AND SOMETIMES STOPING. WHEN WEIGHT IS PLACE ON BED THE REAR END MAKE NOISES. SOMETHING IS WRONG IN THE REAR END OF THIS TRUCK. WHEN TRUCK IS MOVING AND TURNING YOU CAN HERE THE NOISE.

NHTSA ODI 11329880

Working with the data? Download all 17 complaints as CSV · fetched from NHTSA July 20, 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 2018 GMC Sierra Denali verdict →