Brake Caliper Replacement Front

1. Remove two-thirds of the brake fluid from the master cylinder.
2. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
3. Support the vehicle with safety stands.
4. Mark the relationship of the wheel to hub.
5. Remove the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation .



6. Position a C-clamp and tighten until the piston bottoms in the bore.
7. Remove the C-clamp.
8. Remove the brake hose.
9. Remove the screw.



10. Remove the support key using a brass punch and hammer.
11. Remove the spring.
12. Remove the caliper assembly.
13. Inspect the inside of the caliper assembly for signs of fluid leakage. If any is found, refer to Brake Caliper Inspection .
14. Clean the machined surfaces of the anchor plate and caliper with a wire brush.

1. Lubricate the caliper and anchor plate sliding surfaces with Delco Silicone Lube GM P/N 18010909, or equivalent.

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

2. Install the caliper assembly.
3. Install the spring.



4. Install the support key with a brass punch and hammer.

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.

5. Install the bolt into the circular cutout in the key.

Tighten
Tighten the bolt to 20 N·m (15 lb ft).

6. Install the brake hose.

•	Refer to Front Brake Hose Replacement

•	Rear Brake Hose Replacement .

7. Bleed the brake system. Refer to Hydraulic Brake System Bleeding .
8. Install the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation .

Important: Before moving the vehicle, pump the brake pedal several times in order to make sure the pedal is firm. Do not move the vehicle until a firm pedal is obtained. Check the brake fluid level in the master cylinder after pumping the brakes.

9. Lower the vehicle.

Brake Caliper Replacement Rear

1. Block the vehicle wheels.
2. Drain approximately 2/3 of the brake fluid from the master cylinder.

•	Drain brake fluid from the bleeder valve at the brake caliper.

•	Do not completely drain the reservoir.

•	Discard the drained brake fluid.

3. Raise the vehicle. Refer to Vehicle Lifting and Jacking in General Information.
4. Support the vehicle with safety stands.
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 screw.
7. Remove the brake caliper retainer and brake caliper retainer spring with a brass punch.



8. Compress the brake caliper pistons.

•	Use a C-clamp between the inner brake caliper housing and the outer brake pad, or use screwdrivers in order to pry between the outer brake caliper housing and the other brake pad.

•	Watch for possible fluid overflow at the reservoir during this step.

•	The inner brake pad may stay on the brake caliper mounting plate.





Notice: Do not allow calipers to hang from the flexible hoses. Doing so can damage the hoses.

Important: 

•	Do not let the brake caliper hang from the brake hose. Suspend the brake caliper with a wire or cord.

•	It is not always necessary to remove the brake hose from the brake caliper when replacing the brake pad assemblies.

•	Clean the area around the brake hose on the brake caliper.

•	Cap or tape the fitting in order to prevent dirt from entering the brake hose.

9. Disconnect the brake hose.
10. Remove the brake caliper.
11. Inspect the inside of the brake caliper for hydraulic fluid leaks. Overhaul the brake caliper if leaks are found. Refer to Brake Caliper Overhaul .
12. Inspect the piston seal for leaks and fluid around the following components:

•	The dust boot

•	The heat shield

•	The inboard brake pad




13. Inspect the piston dust boots for the following conditions:

•

Burns

•

Tears

•

Damage

14. Overhaul the brake caliper if you find damage. Refer to Brake Caliper Overhaul .
15. Inspect the V-way surfaces on the brake caliper.
16. Inspect the support rail surfaces on the brake caliper mounting plate.
17. Replace the dust shields if they are loose.
18. Inspect under the boots for leakage. Overhaul the brake caliper if leakage is found. Refer to Brake Caliper Overhaul .
19. Clean the following surfaces with a wire brush:

•	The V-way surfaces of the brake caliper

•	The support rail surfaces on the brake caliper mounting plate

20. File smooth any deep nicks or gouges.



21. Lubricate the brake caliper V-way surfaces and the support rail surfaces with brake caliper slide lubricant GM P/N 123776969 or equivalent.

Important: Never drive the pistons in with a mallet or metal tools. If the piston cannot be pushed by hand, place a small block of wood over the pistons and the boots. Use a C-clamp around the wood block and the brake caliper housing in order to push in the pistons.

1. Install the brake caliper pistons to the bottom of the bores.



2. Install the brake caliper.

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

3. Install the brake hose (if disconnected).

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.

4. Loosely assemble the brake hose nut to the brake caliper.
5. 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).

6. Install the brake caliper retainer and brake caliper retainer spring in the support rail.
7. Refer to Brake Caliper and Anchor Plate Wear Adjustment .
8. Lubricate the brake caliper retainer and the brake retainer spring with brake caliper slide lubricant GM P/N 12377969 or equivalent.



9. Tap the brake caliper retainer and the brake caliper retainer spring into place using a brass punch and a light weight hammer.

Important: 

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

•	The brake caliper retainer screw may be reused only 4 times. Replace the screw if the screw has been reused 4 times.

10. Install the caliper retainer screw.

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

11. Fill the master cylinder with brake fluid. Refer to Master Cylinder Reservoir Filling .

Important: Pump the brake pedal several times in order to make sure the pedal is firm and the brake pads are adjusted. Check the master cylinder fluid level after pumping the brake pedal.

12. If any pipes or hoses are disconnected, bleed the hydraulic brake system. Refer to Hydraulic Brake System Bleeding .
13. Install the tire and wheel assembly.
14. Lower the vehicle.
15. Remove the wheel blocks.