2004 Chevrolet Trailblazer power train problems
62 owner complaints filed with NHTSA name the power train on the 2004 Chevrolet Trailblazer — 6% of all complaints for this model year.
What owners report
“Electronic throttle body? No throttle control, motor will only idle, turn ignition switch off, then restart it will run. Reduced Engine Power light comes on. Happens for no apparent reason. Very unsafe situation.”
filed Jan 6, 2022
“Transmission oil cooler lines are corroded to the point where they are leaking fluid and the vehicle only has 130000 miles on it.”
filed Oct 15, 2018
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Related service bulletins
GM is receiving damaged (cracked or broken) transmission cores returned to the reman facilities. The damage is being caused either in the removal process by the technician, or inadequate packaging or shipping. This…
24-NA-141 · Service Bulletin/Repair Instructions · issued Jul 24, 2024
Power Train problems in other Trailblazer years
| Year | Reports | Share |
|---|---|---|
| 2025 Trailblazer | 6 | 32% |
| 2024 Trailblazer | 7 | 22% |
| 2023 Trailblazer | 9 | 15% |
| 2022 Trailblazer | 32 | 30% |
| 2021 Trailblazer | 38 | 20% |
| 2009 Trailblazer | 1 | 4% |
| 2008 Trailblazer | 10 | 5% |
| 2007 Trailblazer | 15 | 2% |
| 2006 Trailblazer | 49 | 4% |
| 2005 Trailblazer | 51 | 3% |
| 2003 Trailblazer | 103 | 11% |
| 2002 Trailblazer | 310 | 27% |
Other reported problem areas on the 2004 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.