Silverado 3500 4WD V8-6.0L VIN U (2004)
19. Important:
Care must be used when removing the piston boot and seal from the caliper. Use a small plastic or wood tool for removal. Do not use a metal tool
because it may damage the caliper bore or seal groove.
Remove the piston boots from the brake caliper.
20. Remove the piston seals from the brake caliper.
21. Remove the brake caliper bleeder valve and cap from the brake caliper.
22. Important:
Do not use abrasives to clean the brake caliper piston.
Clean the brake caliper piston bore and seal counterbore, and the caliper piston with denatured alcohol, or equivalent.
23. Dry the caliper piston bores and counterbores, and the piston with non-lubricated, filtered air.
24. Inspect all of the brake caliper parts as follows.
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Piston - Inspect for scoring, nicks, cracks, wear, or corrosion. Replace the pistons if any damage is found.
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Caliper Bore - Inspect for scoring, nicks, cracks, wear, or corrosion. Use crocus cloth to polish out light corrosion. Otherwise, replace the
caliper. Do not hone the caliper bore.
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Seal groove in the caliper bore for nicks or burrs. If found, replace the caliper.
25. Install the brake caliper bleeder valve and bleeder valve cap into the brake caliper.
26. Lubricate the new piston seal with Delco Supreme 11®, GM P/N 12377967 (Canadian P/N 10953488) or equivalent DOT-3 brake fluid from a
clean, sealed brake fluid container.
27. Install the lubricated, new piston seals into the caliper bores.
28. Install the caliper piston into the caliper bore.
29. Install the new piston dust boot seal over the piston.
30. Using the J 45515 , fully seat the piston dust boot seal in the caliper.
31. Install the brake caliper to the vehicle. Refer to Brake Caliper Replacement - Front.
