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What 26 owners told NHTSA about the 2019 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 (26)Crash / fire / injury (1)Brakes (8)Steering (7)Electrical system (5)Electronic Stability Control (esc) (5)Engine (4)Transmission & drivetrain (4)Lights (2)Backup camera & sensors (1)Body & structure (1)Engine & cooling (1)

1 of 26 complaints match · crash/fire/injury only · clear filters

Apr 21, 20201 injury

WHILE TRUCK WAS PARKED (ENGINE WAS NOT RUNNING AT ALL), I USED THE KEY FAB REMOTE TO UNLOCK THE TRUCK AND THEN OPEN THE TAILGATE. AT THIS TIME, THE TAILGATE SLAMMED OPEN (VERY FORCEFULLY AND QUICKLY) AND HIT MY SON IN THE CHEST. THIS HAS ALSO HAPPENED WHILE THE TRUCK WAS RUNNING AND IN PARK. AT THAT TIME, I (THE DRIVER) PUSHED THE BUTTON ON THE CENTER DASH TO OPEN THE TAILGATE SO THAT MY YOUNG SON COULD PUT HIS BASEBALL GEAR IN THE BED OF THE TRUCK. AGAIN, THE TAILGATE OPENED VERY QUICKLY AND ABRUPTLY, SLAMMED OPEN, AND THE HEAVY TAILGATE HIT HIM IN HIS BODY. THE TAILGATE IS SUPPOSED TO OPEN SLOWLY AND GRADUALLY, NOT SLAM OPEN. THANKFULLY, MY SON WAS NOT SERIOUSLY INJURED. THE REMOTE CONTROL, SLOW OPENING TAILGATE WAS ONE OF THE SELLING FEATURES OF THE TRUCK, AND NOW THE TAILGATE IS DANGEROUS TO USE AT ALL, ESPECIALLY WHEN CHILDREN ARE AROUND.

NHTSA ODI 11321767

Working with the data? Download all 26 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 2019 GMC Sierra Denali verdict →