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Rear 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 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.
  6. Remove the bleeder valve and bleeder valve cap from the caliper body. See Fig 1 .
  7. Remove the guide pins and guide pin sleeves from the anchor bracket.
  8. Clean the following components with denatured alcohol:
    • The bleeder valve.
    • The caliper bore.
    • The caliper passages.
    • The piston.
    • The lining contact area on the anchor bracket.
  9. Dry the parts and blow out the brake fluid passages. Use dry and filtered compressed air.
  10. Replace the piston 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 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.
  11. Replace the bleeder valve cap. Tighten the bleeder valve. See TORQUE SPECIFICATIONS  .
Fig 1: Identifying Bleeder Valve
G00307609Courtesy of GENERAL MOTORS CORP.
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