2003 Chevrolet Trailblazer engine problems
15 owner complaints filed with NHTSA name the engine on the 2003 Chevrolet Trailblazer — 2% of all complaints for this model year.
What owners report
“Transmission doesn’t have 3rd or 4th gear. Vehicle was smoking under hood. Found out after buying it it has flood damage. Mechanic said there was water in the transmission when inspected. Vehicle needs catylic converter sensor and vehicle has bad ground wire. Seller didn’t inform me of any of these…”
filed Mar 1, 2023
“Tl* the contact owns a 2003 chevrolet trailblazer. While driving various speeds, the front end of the vehicle vibrated. The vibration was more pronounced while the engine was idling. Also, while ascending up a hill, the vehicle would not properly accelerate. The vehicle was taken to an independent…”
filed Aug 20, 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% |
| 2004 Trailblazer | 16 | 1% |
| 2002 Trailblazer | 17 | 1% |
Other reported problem areas on the 2003 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.