Sierra Classic 3500 4WD V8-6.0L (2007)
Brake Caliper: Overhaul
Front
Front Brake Caliper Overhaul (25/3500 Series)
Caution: Refer to Brake Dust Caution.
Caution: Refer to Brake Fluid Irritant Caution.
Disassembly Procedure
1. 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.
Important: The brake calipers contain phenolic pistons that have stainless steel caps that contact the brake pad. Use compressed air to remove
the piston from the caliper.
Remove the brake caliper.
2. Place a thin piece of wood in front of the piston in order to prevent damage. Remove the piston by directing compressed air into the brake hose
inlet fitting port of the brake caliper.
3. Remove the piston boot.
4. Remove the piston seal.
5. Remove the caliper bleed screw cap.
6. Remove the caliper bleed screw.
7. Inspect the caliper bore and the piston seal groove for scoring and corrosion. If you find excessive scoring or corrosion around the piston seal area,
replace the brake caliper.
