Having problems with your 2004 Chevrolet TrailBlazer ?
Both of my 2004 chevy trailblazer brake lights are not working. i changed the bulbs and the fuses under the hood and under the rear driver side seat. still not working. looking for help
Looks like you have check every thing that need to check, if the top center brake light work's it's going to be your turn signal switch not a cheap part, the reason is the circuit for the brake light's goes thought the turn signal switch, replace
Check the ground wire, possibly in the back behind one of the access panels near the wiring harness
Repair Help & Product Troubleshooting for 2004 Chevrolet TrailBlazer
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