CTS V6-3.2L VIN N (2003)
Important: Do not use abrasives to clean the brake caliper piston.
18. Inspect the brake caliper mounting bracket guide surfaces for corrosion and wear. Remove and replace the brake caliper mounting bracket if
damaged or worn.
19. Clean the brake caliper piston bores and seal counter-bores with denatured alcohol, or equivalent.
20. Clean the brake caliper pistons with denatured alcohol, or equivalent.
21. Dry the caliper piston bores and counter-bores with non-lubricated, filtered air.
22. Dry the brake caliper pistons with non-lubricated, filtered air.
23. Inspect the caliper bores for cracks, scoring, pitting, excessive corrosion.
24. If light corrosion is present in the caliper bores, attempt to remove the imperfection with a fine emery paper. If the imperfection cannot be
removed, replace the caliper assembly.
25. If cracks, scoring, pitting, and excessive corrosion are present in the caliper bores, replace the caliper assembly.
26. Inspect the caliper pistons for cracks, scoring, and~or damage. Replace the caliper pistons if any of these conditions exist.
Assembly Procedure
Notice: Refer to Fastener Notice in Cautions and Notices.
1. Install the brake caliper bleeder valve (1).
Tighten
Tighten the brake caliper bleeder valve to 14 N.m (124 lb in).
2. Install the brake caliper bleeder valve cap.
3. Lubricate the new piston seals (1) with Delco Supreme 11, GM P/N 12377967 (Canadian P/N 992667) or equivalent DOT-3 brake fluid from a
clean, sealed brake fluid container.
4. Install lubricated piston seals (1) into the brake caliper bore seal grooves.
5. Make sure the seals are not twisted.
6. Lubricate the brake caliper bores and the pistons (3) with brake fluid.
7. Install the caliper pistons (3) into the caliper bores.
8. Install the new piston dust boot seals (2) over the pistons.
9. Assemble the J 8092 and the J 45507
10. Complete the following for both caliper piston dust boot seals (2).
10.1. Using J 8092 and J 45507 fully seat the dust boot seal into the caliper.
10.2. Make sure the caliper piston dust boot is properly seated into the groove in the brake caliper bore.
11. Install the caliper to the vehicle. Refer to Brake Caliper Replacement - Front. See: Brake Caliper Replacement - Front
