2021 Chevrolet Trailblazer fuel/propulsion system problems
17 owner complaints filed with NHTSA name the fuel/propulsion system on the 2021 Chevrolet Trailblazer — 9% of all complaints for this model year.
What owners report
“Original Owner of 2021 Chevy Trailblazer LT. Purchased new in April 2021. Vehicle has a history of major powertrain issues, starting with Check Engine light during its first year of ownership, culminating in a complete turbocharger replacement in December 2025. This only as a result of my research…”
filed Sep 3, 2026
“Vehicle Diagnostic Summary – Trouble Codes Explained 1. P0562 – System Voltage Low The vehicle’s electrical system is running at low voltage. This could be due to a weak battery, a failing alternator, or poor electrical connections. It may cause various electronic issues and unexpected shutdowns if…”
filed Jul 24, 2025
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Fuel/propulsion System problems in other Trailblazer years
| Year | Reports | Share |
|---|---|---|
| 2023 Trailblazer | 3 | 4% |
| 2022 Trailblazer | 5 | 5% |
| 2009 Trailblazer | 1 | 4% |
| 2008 Trailblazer | 5 | 3% |
| 2007 Trailblazer | 58 | 8% |
| 2006 Trailblazer | 76 | 7% |
| 2005 Trailblazer | 95 | 6% |
| 2004 Trailblazer | 43 | 4% |
| 2003 Trailblazer | 55 | 6% |
| 2002 Trailblazer | 23 | 2% |
| 2000 Trailblazer | 2 | 8% |
Other reported problem areas on the 2021 Chevrolet Trailblazer
Counts are unique NHTSA complaints naming this component group. Complaints are unverified owner reports; mileage is computed only from complaints that included a usable odometer reading.