Disassembly (Rear - 2500 & 3500 Series)
WARNING: This page does not describe the selected car, but rather 12 other vehicles, including the 2003 GMC Yukon XL, 2003 GMC Yukon, 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, and 2003 Chevrolet Tahoe. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Replace all the components included in the repair kits used to service this brake caliper. Lubricate the rubber parts with clean brake fluid to make assembly easier. The torque values specified are for dry, non lubricated fasteners. Perform the service operations on a clean bench, free from all mineral oil materials.
- Remove the brake caliper from the vehicle. See Figure. See BRAKE CALIPER under REMOVAL & INSTALLATION.WARNING: 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.
- Place a thin piece wood in front of the pistons in order to prevent damage. Remove the pistons by directing compressed air into the brake hose inlet fitting port of the brake caliper housing.
- Remove the 2 pistons.
- Remove the 2 piston boots. See Fig 1.
- Remove the 2 piston seals.
- Remove the brake caliper bleed screw cap.
- Remove the brake caliper bleed screw.
- Inspect the brake caliper bores and the piston seal grooves for scoring and corrosion. If you find excessive scoring or corrosion around the 2 piston seal areas replace the brake caliper housing.
- Inspect the brake caliper mounting bracket guide surfaces for corrosion and wear. Remove and replace the brake caliper mounting bracket if needed. See Fig 2.
- Clean all the residue from the brake pad guiding surfaces on the brake caliper housing and the brake caliper mounting bracket.
- Clean all the parts not included in the repair kit with denatured alcohol.
- Dry all the parts with non lubricated filtered compressed air.
- Blow out all passages in the brake caliper housing and the brake caliper bleeder valve.