Feb 28, 2021EngineBackup camera & sensorsDriver assistance
THE TRUCK IS PARKED AT DEALERSHIP
NHTSA ODI 11398288
Home · 2021 GMC Sierra 2500 Hd · Complaints
What 49 owners told NHTSA about the 2021 GMC Sierra 2500 Hd
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 (49)Crash / fire / injury (4)Transmission & drivetrain (12)Lights (9)Engine (8)Electrical system (6)Body & structure (5)Brakes (5)Latches & locks (4)Driver assistance (3)Airbags (2)Backup camera & sensors (1)
1 of 49 complaints match · Backup camera & sensors · clear filters
Working with the data? Download all 49 complaints as CSV · fetched from NHTSA July 19, 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 Sierra 2500 Hd verdict →