Disassembly Procedure

WARNING:

Do not place fingers in front of the caliper piston(s) in an attempt to catch or protect it when applying compressed air. The piston(s) can fly out with force and could result in serious bodily injury.

CAUTION:

Use clean cloths to pad interior of caliper housing during piston removal. Use just enough air to ease the pistons out of the bores. If the pistons are blown out, even with the padding provided, it may be damaged.

Front Brake Caliper - Remove - Front Brake Caliper Replacement
Courtesy of GENERAL MOTORS COMPANY

Bleeder Valve (1) and Cap (2) - Remove
Courtesy of GENERAL MOTORS COMPANY

NOTE:
Direct low-pressure, compressed air through the brake caliper fluid inlet.

Brake Caliper Piston (1) - Remove
Brake Caliper Piston Dust Boot (2) - Remove and DISCARD
Courtesy of GENERAL MOTORS COMPANY

NOTE:
Use a wooden or plastic tool to remove the seal.

Brake Caliper Piston Seal (1) - Remove and DISCARD
If cracks, scoring, pitting, excessive rust, and/or excessive corrosion are present in the caliper bore, replace the caliper assembly.
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.
Clean the brake caliper piston bore and seal counterbore, and the caliper piston with denatured alcohol, or equivalent.
Dry the caliper piston bore and counterbore, and the piston with non-lubricated, filtered, compressed air.

NOTE:

Do NOT use abrasives to clean the brake caliper piston.

Inspect the caliper piston for cracks, scoring, and/or damage to the plating. Replace the caliper piston if any of these conditions exist.
Inspect the caliper mounting holes for cracks, scoring, pitting, rust and/or excessive corrosion. Replace the caliper assembly if any of these conditions exist.