Engine oil life system reset
Before you start
- with the engine off.
Steps
- Turn the ignition key to RUN with the engine off.
- Fully press and release the accelerator pedal slowly three times within five seconds.
- Turn the key to LOCK.
- Reinstall the cover and tighten the screws.
Source: 2005 Chevrolet TrailBlazer and Chevrolet TrailBlazer EXT Owner Manual, page 5-19