Here's a step by step
http://forums.trailvoy.com/showthread.php?t=59485
Trailblazer enthusiasts will cover all the subjects including brake jobs at www.trailvoy.com
WHICH brake light?
Yes.
Change the ignition switch. About 40$ and 30 mins of your time. Had it happen on several Trailblazers and envoys.
All vehicles have brake pads.mine has disk brakes and the pads take about 10 minutes a piece to change.
In a 2004 Chevrolet TrailBlazer, the fuse for the brake lights is located in the under-dash fuse panel. To access it, open the driver's side door and remove the cover under the dashboard. The specific fuse for the brake lights is typically labeled as "STOP" or "Brake." Always refer to the owner's manual for the exact fuse location and specifications.
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Change the brake pads sensors. You must change them after every brake pad swap.
remove and replace engine coolant temperature(ect)/chevy 2004 trailblazer
AnswerIgnition on - engine off - floor the gas pedal 3 times. That's it!
see "how too replace water pump on 2002 Trailblazer"