Grand Prix V8-5.3L (2007)
2. Drain the brake fluid from the caliper assembly.
3. Using a small wooden or plastic tool, carefully remove the brake caliper piston dust boot seal retaining ring from the groove in the caliper seal
counterbore.
4. Place a block of wood against the inside of the caliper body, opposite of the caliper piston.
5. Direct low pressure compressed air through the caliper inlet hose to remove the caliper piston.
6. Remove the piston dust boot seal (2) from the seal counterbore in the caliper and discard the dust boot seal.
7. Using a small wooden or plastic tool, remove the piston seal from the caliper bore and discard the piston seal.
8. Inspect the operation of the integral park brake mechanism. Rotate the park brake lever back and forth while observing the movement of the park
brake mechanism actuator assembly in the caliper bore.
Important: The park brake lever, lever return spring and actuator shaft seal are not serviceable components of the integral park brake
mechanism. Do not disassemble the integral park brake mechanism.
9. If the integral park brake mechanism was not operating properly (binding or seized), replace the brake caliper assembly.
Installation Procedure
Important: Do not use abrasives to clean the brake caliper piston.
1. If cracks, scoring, pitting, excessive rust, and/or excessive corrosion are present in the caliper bore, replace the caliper assembly.
2. If light rust or light corrosion are present in the caliper bore, attempt to remove the imperfection with a fine emery paper. If the imperfection
cannot be removed, replace the caliper assembly.
3. Clean the brake caliper piston bore and seal counterbore, the caliper piston, and the caliper sleeves with denatured alcohol, or equivalent.
4. Dry the caliper piston bore and counterbore, the piston, and the sleeves with non-lubricated, filtered air.
