2021 Chevrolet Trailblazer power train problems
40 owner complaints filed with NHTSA name the power train on the 2021 Chevrolet Trailblazer — 21% of all complaints for this model year.
What owners report
“Dear Chevy, I am reaching out to you again because I am desperately requesting immediate assistance with my vehicle, which has now become an extremely serious and dangerous safety concern. On Friday, [XXX], I had my vehicle towed to the dealership because of the ongoing mechanical issues I have…”
filed Sep 7, 2026
“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
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Power Train problems in other Trailblazer years
| Year | Reports | Share |
|---|---|---|
| 2025 Trailblazer | 6 | 29% |
| 2024 Trailblazer | 7 | 21% |
| 2023 Trailblazer | 10 | 15% |
| 2022 Trailblazer | 33 | 31% |
| 2009 Trailblazer | 1 | 4% |
| 2008 Trailblazer | 10 | 5% |
| 2007 Trailblazer | 15 | 2% |
| 2006 Trailblazer | 50 | 5% |
| 2005 Trailblazer | 51 | 3% |
| 2004 Trailblazer | 62 | 6% |
| 2003 Trailblazer | 103 | 11% |
| 2002 Trailblazer | 310 | 27% |
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.