2021 GMC Sierra 1500 problems and complaints
Owners have filed 567 complaints with NHTSA about the 2021 GMC Sierra 1500. The most-reported areas: Engine (301), Power Train (134), Electrical System (73).
Key takeaways
- 567 owner complaints on file with NHTSA.
- 5 involve a crash, 6 a fire, 2 reported injuries.
- Complaints are unverified owner reports; recalls are confirmed defects.
| Component | Complaints | Share |
|---|---|---|
| Engine | 301 | 53% |
| Power Train | 134 | 24% |
| Electrical System | 73 | 13% |
| Engine And Engine Cooling | 49 | 9% |
| Unknown Or Other | 42 | 7% |
| Fuel/Propulsion System | 34 | 6% |
| Steering | 33 | 6% |
| Service Brakes | 24 | 4% |
| Structure | 12 | 2% |
| Latches/Locks/Linkages | 10 | 2% |
| Suspension | 9 | 2% |
| Lane Departure | 8 | 1% |
One complaint can name several components, so shares add up to more than 100%.
| Version | Overall | Front | Side | Rollover |
|---|---|---|---|---|
| 2021 GMC Sierra 1500 PU/CC 4WD | 4/5 | 4/5 | 5/5 | 4/5 |
| 2021 GMC Sierra 1500 PU/EC 4WD | 5/5 | 4/5 | 5/5 | 4/5 |
| 2021 GMC Sierra 1500 PU/RC 4WD | 5/5 | 4/5 | 5/5 | 4/5 |
| 2021 GMC Sierra 1500 PU/CC 2WD | 4/5 | 4/5 | 5/5 | 4/5 |
Latest complaints, as filed
Owner-written and unverified by NHTSA.
Suspension,engine - filed 2026-09-18
Both of my upper ball joints wore out and one broke as I was driving down the road at 65 miles an hour pulling me into the on coming lane of traffic, there was no warning of this. I had both upper and lower ball joint replace. If there had been another vehicle coming in the on coming lane we would have had a head on co...
Engine - filed 2026-09-18
While driving 40 MPH my entire dash lite up with every known light and the vehicle lost all power. The dealer stated I need an entire engine replacement, as with Many 6.2. My vehicle is 1 months out side of the recall, it has the exact symptoms and the exact damage as the recall.
Unknown Or Other - filed 2026-09-17
NUMERO DE VIN FALTANTE
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More for the 2021 GMC Sierra 1500
Complaints are reports filed by owners with the National Highway Traffic Safety Administration. NHTSA publishes them without verifying them, and counts rise with how many cars were sold, so compare years of the same model rather than different models. Crash ratings are NHTSA's own 5-Star Safety Ratings results.