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Front Brake Caliper: Disassembly

WARNING: This page is about a different car, the 2002 Oldsmobile Bravada, 2002 GMC Envoy XL, 2002 GMC Envoy, and 2002 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
  1. Drain all the brake fluid from the caliper.
  2. Pad the interior of the caliper with clean shop towels.
  3. Remove the pistons (2) from the caliper bores. See Figure .
  4. Remove the boots (1) from the caliper bores. Do not scratch the caliper bores. See Figure .
  5. Remove the piston seals (3) from the caliper bores. Do not use a metal tool. See Figure .
  6. Remove the bleeder valve cap (4). See Figure .
  7. Remove the bleeder valve (5) from the caliper housing (6). See Figure .
  8. Clean the bleeder valve, the caliper bores, the caliper passages and the pistons with denatured alcohol. Dry the parts and blow out the brake fluid passages. Use dry and filtered compressed air.
  9. Replace the pistons or the caliper if any of the following conditions exist:
    • Scoring on the piston surface or in the caliper bore.
    • Corrosion on the piston.
    • Chrome plating damage on the piston.
    • Corrosion in the caliper bore Use a crocus cloth in order to polish light corrosion from the caliper bore. Replace the caliper if the corrosion cannot be removed.
    • Pitting in the caliper bore.
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