2004 Chevrolet Trailblazer engine problems
16 owner complaints filed with NHTSA name the engine on the 2004 Chevrolet Trailblazer — 1% 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
“2004 chevy trailblazer keeps getting cam position sensor fault. Causing check engine light to come on. Seems to be a common problem with this model. We have replaced this part three to four times on our truck. Truck began to run rough engine knocked and had reduced power.”
filed Jan 16, 2019
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Related service bulletins
This service bulletin advises of a new fuel injection cleaner kit used for decarbonizing the intake valves to correct conditions of rough idle, Crank no start, extended crank or misfire, MIL with DTCs, and explains how…
16-NA-383 · Service Bulletin/Repair Instructions · issued Jun 28, 2024
Engine problems in other Trailblazer years
| Year | Reports | Share |
|---|---|---|
| 2025 Trailblazer | 3 | 16% |
| 2024 Trailblazer | 9 | 28% |
| 2023 Trailblazer | 14 | 23% |
| 2022 Trailblazer | 16 | 15% |
| 2021 Trailblazer | 36 | 19% |
| 2009 Trailblazer | 2 | 7% |
| 2008 Trailblazer | 21 | 11% |
| 2007 Trailblazer | 22 | 3% |
| 2006 Trailblazer | 43 | 4% |
| 2005 Trailblazer | 30 | 2% |
| 2003 Trailblazer | 15 | 2% |
| 2002 Trailblazer | 17 | 1% |
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.