Yukon XL 2500 2WD V8-6.0L VIN N (2006)
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.
2. 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.
3. Remove the 2 pistons.
4. Remove the 2 piston boots.
5. Remove the 2 piston seals.
6. Remove the brake caliper bleed screw cap.
7. Remove the brake caliper bleed screw.
8. 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.
9. Inspect the brake caliper mounting bracket guide surfaces for corrosion and wear. Remove and replace the brake caliper mounting bracket if
needed.
10. Clean all the residue from the brake pad guiding surfaces on the brake caliper housing and the brake caliper mounting bracket.
11. Clean all the parts not included in the repair kit with denatured alcohol.
12. Dry all the parts with non lubricated filtered compressed air.
13. Blow out all passages in the brake caliper housing and the brake caliper bleeder valve.
Assembly Procedure
Notice: Refer to Fastener Notice in Service Precautions.
1. Install the brake caliper bleed screw.
Tighten the brake caliper bleed screw to 12 Nm (106 inch lbs.).
2. Install the brake caliper bleed screw cap.
3. Lubricate the new piston seal and the brake caliper bore seal groove with brake fluid.
4. Install new the seal into the brake caliper bore seal groove.
5. Ensure that the seal is not twisted.
6. Lubricate the brake caliper bore and the piston with brake fluid.
7. Install the boot and the piston.