2004 Chevrolet Trailblazer electrical system problems
627 owner complaints filed with NHTSA name the electrical system on the 2004 Chevrolet Trailblazer — 58% 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
“As you come to a complete stop or go under 5 mph, the vehicle's oil gauge will go all the way down. Once you accelerate, the oil gauge goes back to normal. When pumping gas into the vehicle, the gas pump will reset as if the gas tank is full but the gauge shows it's half empty. *tr”
filed Jun 6, 2020
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Related service bulletins
This Preliminary Information communicates to the dealer the process for downloading or updating operating software for the Tire Pressure Monitor, Active Fuel Injector tester, multi media tester, PICO Scope, GR8…
PIP4723J · Service Bulletin/Repair Instructions · issued Oct 25, 2024Vehicle Wide Programming (VWP) is a new process to update software on GM Vehicles. It provides the ability via a single selection within Techline Connect to first identify which modules need updating and then proceed to…
General Communication · Service Campaign · issued Aug 26, 2024
Electrical System problems in other Trailblazer years
| Year | Reports | Share |
|---|---|---|
| 2025 Trailblazer | 11 | 58% |
| 2024 Trailblazer | 11 | 34% |
| 2023 Trailblazer | 14 | 23% |
| 2022 Trailblazer | 29 | 27% |
| 2021 Trailblazer | 39 | 21% |
| 2009 Trailblazer | 9 | 33% |
| 2008 Trailblazer | 65 | 34% |
| 2007 Trailblazer | 200 | 27% |
| 2006 Trailblazer | 251 | 23% |
| 2005 Trailblazer | 617 | 42% |
| 2003 Trailblazer | 285 | 32% |
| 2002 Trailblazer | 181 | 16% |
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.