Rear Brake Caliper Replacement Fixed-Mount

1. Apply the parking brake.
2. Block the wheels.

Important: 

•	Do not completely drain the master cylinder reservoir.

•	Drain the fluid from the brake caliper bleeder valve.

•	Drain the fluid into a suitable container.

•	Discard the fluid.

3. Remove about 2/3 of the brake fluid from the master cylinder reservoir.
4. Raise the vehicle. Support the vehicle with safety stands. Refer to Lifting and Jacking the Vehicle in General Information.
5. Remove the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.
6. Remove the brake pad retainer spring bolt.
7. Remove the brake pad retainer spring.



8. Push back the pistons on one side of the brake caliper.

Notice: 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.

9. Remove the brake pad.
10. Push back the pistons on the other side of the brake caliper.
11. Remove the remaining brake pad.
12. Remove the brake pipe clip nuts and washers from the rear axle housing studs.
13. Remove the brake pipe bolt and 2 gaskets from the caliper.
14. Cap or tape the brake pipe fitting in order to prevent contamination.




Notice: Do not loosen or remove the four bolts in the brake caliper bridge area. The brake caliper bridge bolts may become loose. If the bridge bolts become loose, replace the brake caliper. Failure to follow these instructions will cause damage to the brake caliper.

15. Remove the brake caliper bolts and washers.
16. Remove the brake caliper from the brake caliper mounting plate.

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

1. Install the brake caliper onto the brake caliper mounting plate.

Tighten
Tighten the brake caliper bolts to 425 N·m (313 lb ft).

2. Install the brake pipe clips onto the rear axle housing studs.
3. Install the brake pipe clip washers and nuts onto the rear axle housing studs.

Tighten
Tighten the brake pipe clip nuts to 17 N·m (13 lb ft).

4. Install the brake pipe gaskets and bolt.

Tighten
Tighten the brake pipe bolt to 37 N·m (27 lb ft).




5. Install the brake pads.
6. Install the brake pad retainer spring.
7. Install the brake pad retainer spring bolt.

Tighten
Tighten the brake pad retainer spring bolt to 41 N·m (30 lb ft).

8. Fill the master cylinder reservoir with brake fluid. Refer to Master Cylinder Reservoir Filling in Hydraulic Brakes.
9. Bleed the hydraulic brake system. Refer to Hydraulic Brake System Bleeding in Hydraulic Brakes.

Important: Inspect the fluid level in the master cylinder reservoir after pumping the brake pedal.

10. Pump the brake pedal several times in order to ensure that the pedal is firm and the brake pads are seated.
11. Install the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.
12. Lower the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.

Caution: Do not move the vehicle until a firm brake pedal is obtained. Failure to obtain a firm pedal before moving vehicle may result in personal injury.

13. Remove the wheel blocks.

Rear Brake Caliper Replacement Rail Slider

1. Apply the parking brake.
2. Block the wheels.

Important: 

•	Do not completely drain the master cylinder reservoir.

•	Drain the fluid from the brake caliper bleeder valve.

•	Drained the fluid into a suitable container. Discard the fluid.

3. Remove about 2/3 of the brake fluid from the master cylinder reservoir.
4. Raise the vehicle. Support the vehicle with safety stands. Refer to Lifting and Jacking the Vehicle in General Information.
5. Remove the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.



6. Remove the brake caliper retainer bolt (2).
7. Remove the brake caliper retainer (3) and brake caliper spring (4) using a brass punch.



8. Compress the pistons, using the following method. Use a C-clamp between the inner brake caliper housing and the outer brake pad.



9. Use screwdrivers to pry between the outer brake caliper housing and the outer brake pad.
10. While compressing the pistons, watch the reservoir for possible brake fluid overflow. The inner brake pad may stay on the brake caliper mounting plate, Bendix® caliper.
11. Remove the wheel speed sensor.
12. Disconnect the brake hose.
13. Cap or tape the brake hose fitting in order to prevent contamination.

Notice: 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.

14. Remove the brake caliper.

1. Clean the support rail surfaces of the brake caliper with a wire brush. File smooth any deep nicks or gouges.
2. Clean the support rail surfaces of the brake caliper mounting plate with a wire brush. File smooth any deep nicks or gouges.
3. Apply a thin coat of brake caliper lubricant to the brake caliper support rail surfaces.



4. Apply a thin coat of Brake Caliper Lubricant GM P/N 12377969, or equivalent, to the brake caliper mounting plate support rail surfaces.

Notice: Make sure the brake hose is not twisted or kinked after installation. Damage to the hose could result.

5. Install the brake hose.
6. Loosely assemble the brake hose nut to the brake caliper.

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

7. Loosely assemble the brake hose bracket to the brake caliper.

Tighten

•	Tighten the brake hose nut to 19 N·m (14 lb ft).

•	Tighten the brake hose bracket bolts to 32 N·m (24 lb ft).

8. Install the wheel speed sensor.
9. Apply a thin coat of Brake Caliper Lubricant GM P/N 12377969, or equivalent, to the brake caliper retainer and the brake caliper spring.



10. Tap the brake caliper retainer (3) and brake caliper spring (4) into place using a brass punch and a light weight hammer. The hose in the brake caliper retainer should line up with the threaded hole in the brake caliper mounting plate (1).

Important: 

•	The brake caliper retainer bolt boss must fit in the circular hole in the brake caliper retainer.

•	Do not reuse the brake caliper retainer bolt .

11. Install a NEW brake caliper retainer bolt (1).

Tighten
Tighten the brake caliper retainer bolt to 40 N·m (29 lb ft).

12. Fill the master cylinder reservoir with brake fluid. Use Brake Fluid GM P/N 1052535, or equivalent. Refer to Master Cylinder Reservoir Filling .
13. Bleed the hydraulic brake system. Refer to Hydraulic Brake System Bleeding .

Important: Inspect the fluid level in the master cylinder reservoir after pumping the brake pedal.

14. Pump the brake pedal several times in order to ensure that the pedal is firm and the brake linings are seated.
15. Install the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.
16. Lower the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
17. Remove the wheel blocks.