2021 Chevrolet Suburban problems and complaints
Owners have filed 195 complaints with NHTSA about the 2021 Chevrolet Suburban. The most-reported areas: Engine (85), Power Train (36), Fuel/Propulsion System (22).
Key takeaways
- 195 owner complaints on file with NHTSA.
- 6 involve a crash, 1 a fire, 5 reported injuries.
- Complaints are unverified owner reports; recalls are confirmed defects.
| Component | Complaints | Share |
|---|---|---|
| Engine | 85 | 44% |
| Power Train | 36 | 18% |
| Fuel/Propulsion System | 22 | 11% |
| Electrical System | 18 | 9% |
| Unknown Or Other | 13 | 7% |
| Forward Collision Avoidance | 11 | 6% |
| Fuel System | 10 | 5% |
| Gasoline | 9 | 5% |
| Engine And Engine Cooling | 9 | 5% |
| Service Brakes | 9 | 5% |
| Exterior Lighting | 7 | 4% |
| Seat Belts | 7 | 4% |
One complaint can name several components, so shares add up to more than 100%.
| Version | Overall | Front | Side | Rollover |
|---|---|---|---|---|
| 2021 Chevrolet Suburban SUV 4WD | 4/5 | 4/5 | 5/5 | 3/5 |
| 2021 Chevrolet Suburban SUV 2WD | 4/5 | 4/5 | 5/5 | 3/5 |
Latest complaints, as filed
Owner-written and unverified by NHTSA.
Engine - filed 2026-09-19
Our Chevy Suburban High Country suffered sudden engine failure resulting in the vehicle to shake and smoke while driving on a busy intersection. The dealership diagnosed internal engine mechanical failure at only 46,000 miles. I believe this is directly tied to the known GM 6.2 L87 engine issues.
Engine - filed 2026-09-15
Sudden Loss of Power & Shaking: The misfire itself causes a drastic drop in acceleration. If you are merging onto a highway or trying to pass another vehicle, the sudden loss of power can leave you stranded in the path of oncoming traffic. No Stability Assistance: Because StabiliTrak and Traction Control are automati...
Electrical System - filed 2026-09-15
The radio control unit that controls all the interior features of the car failed due to an over the air update. We can no longer use the radio, gps, hot and cold on the screen or what the rear climate is at, there is no sounds from any of the blinkers or emergency lights.
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More for the 2021 Chevrolet Suburban
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.