TrailBlazer 2WD L6-4.2L VIN S (2003)
1. Drain all the brake fluid from the caliper.
2. Pad the interior of the caliper with clean shop towels.
Caution: Do not place your fingers In front of the piston in order to catch or protect the piston while applying compressed air. This could result In
serious injury.
Notice: Use just enough air pressure to ease the piston out of the bore. You can damage a blown-out piston even with the padding.
3. Remove the piston from the caliper bore.
4. Remove the boot from the caliper bore. Do not scratch the housing bore.
5. Remove the piston seal from the caliper bore. Do not use a metal tool.