Rear Brake Caliper Bracket Replacement (2500 Series)
Rear Brake Caliper Bracket Replacement (2500 Series)
Warning: Refer to Brake Dust Warning (Brake Dust Warning).
Removal Procedure
1. Inspect the fluid level in the brake master cylinder reservoir.
2. If the fluid level is midway between the maximum - full point, and the minimum allowable level, no fluid needs to be removed from the reservoir before proceeding.
3. If the fluid level is higher than midway between the maximum - full point, and the minimum allowable level, remove fluid to the midway point before proceeding.
4. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle (Service and Repair).
5. Remove the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation (Service and Repair).
6. Compress the brake caliper pistons.
1. Install a large C-clamp over the top of the caliper housing and against the back of the outboard pad.
2. Slowly tighten the C-clamp until the pistons are pushed completely into the caliper bores.
3. Remove the C-clamp from the caliper.
7. Loosen, but do not remove the rear brake caliper guide pin bolts.
8. Remove the brake caliper bracket mounting bolts (2).
9. Remove the caliper bracket (1) and brake caliper as an assembly.
Caution: Support the brake caliper with heavy mechanic wire, or equivalent, whenever it is separated from its mount and the hydraulic flexible brake hose is still connected. Failure to support the caliper in this manner will cause the flexible brake hose to bear the weight of the caliper, which may cause damage to the brake hose and in turn may cause a brake fluid leak.
10. Remove the caliper guide pin bolts from the caliper bracket.
Support the caliper with heavy mechanic's wire or equivalent. DO NOT disconnect the hydraulic brake hose from the caliper.
11. Remove the brake pads from the caliper bracket.
12. Remove the retaining springs.
Installation Procedure
1. Install the retaining springs to the caliper bracket.
2. Install the brake pads.
3. Install the caliper to the caliper bracket.
4. Install the brake caliper guide pin bolts to the caliper bracket. DO NOT tighten.
5. Install the caliper and caliper bracket (1) as an assembly.
6. Perform the following procedure before installing the caliper bracket bolts.
1. Remove all traces of the original adhesive patch.
2. Clean the threads of the bolt with denatured alcohol or equivalent and allow to dry.
3. Apply threadlocker GM P/N 12345493 (Canadian P/N 10953488) to the threads of the bolt.
Caution: Refer to Fastener Caution (Fastener Caution).
7. Install the brake caliper bracket mounting bolts (2) and tighten to 200 Nm (148 lb ft).
8. Tighten the brake caliper guide pin bolts to 108 Nm (80 lb ft).
9. Install the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation (Service and Repair).
10. With the engine OFF, gradually apply the brake pedal to approximately 2/3 of its travel distance.
11. Slowly release the brake pedal.
12. Wait 15 seconds, then repeat steps 10-11 until a firm pedal is obtained to properly seat the brake caliper pistons and brake pads.
13. Fill the master cylinder reservoir to the proper level with clean brake fluid, if necessary. Refer to Master Cylinder Reservoir Filling (Master Cylinder Reservoir Filling).