Brake Pads Replacement - Front

Repair instructions Brake Pads Replacement - Front

Removal Procedure

Caution: Avoid taking the following actions when you service wheel brake parts:
^ Do not grind brake linings.
^ Do not sand brake linings.
^ Do not clean wheel brake parts with a dry brush or with compressed air.
Some models or aftermarket brake parts may contain asbestos fibers which can become airborne in dust. Breathing dust with asbestos fibers may cause serious bodily harm. Use a water-dampened cloth in order to remove any dust on brake parts. Equipment is available commercia fly In order to perform this washing function. These wet methods prevent fibers from becoming airborne.

1. Use a siphon in order to remove half of the brake fluid from the master cylinder reservoir.
2. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
3. Remove the tire and wheel assembly from the vehicle. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.
4. Install a large C-clamp over the brake caliper. Position the ends of the C-clamp against the rear of the caliper body and against the outer brake pad.
5. Tighten the C-clamp in order to compress the caliper piston into the caliper bore.
6. Remove the C-clamp from the caliper.
7. Remove the 2 caliper bolts.

Notice: Support the brake caliper with heavy mechanic's wire, or equivalent, whenever it is separated from it's 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.

8. Remove the caliper housing (2) from the caliper bracket. Suspend the caliper with a wire (1) in order to prevent damage to the brake hose.
9. Remove the 2 brake pads (6,10).
10. Remove the inner pad wear indicator (3) from the inner pad.
11. Remove the outer pad wear indicator (5), if equipped, from the outer pad.
12. Remove the 2 insulators (1,7).
13. Remove the 2 pad insulators (2,8).

Important: Note the location of the upper retainer and the lower retainer. The upper retainer is not interchangeable with the lower retainer.

14. Remove the 2 brake pad retainers (4,9).

Inspection Procedure
1. Inspect the brake pads for wear. If the pad thickness is less than specification, replace the disc brake pads in axle sets.
Specifictions
The minimum brake pad lining thickness is 1 mm (0.039 in).
2. Clean the 2 brake pad retainers (4,9). Inspect the retainers for the following conditions:
^ Sufficient rebound
^ No deformation
^ No cracks
^ No wear
^ No rust
^ No dirt
If the retainers meet the above conditions, re-use the retainers.
3. Inspect the disc brake hardware. Replace components if necessary. Refer to Disc Brake Mounting and Hardware Inspection - Front. Component Tests and General Diagnostics
4. Inspect the caliper. Repair or replace components as necessary. Refer to Brake Caliper Inspection.

Important: Refinish or replace the rotor ONLY if the condition of the rotor requires service. DO NOT refinish the rotor if the brake pads are the only components requiring service.

5. Measure the brake rotor thickness. Refinish or replace the rotor as necessary. Refer to Brake Rotor Thickness Measurement. Component Tests and General Diagnostics
6. Measure the brake rotor thickness variation. Refinish or replace the rotor as necessary. Refer to Brake Rotor Thickness Variation Measurement. Component Tests and General Diagnostics
7. Inspect the surface of the brake rotor. Refinish or replace the rotor as necessary. Refer to Brake Rotor Surface and Wear Inspection. Component Tests and General Diagnostics
8. Measure the brake rotor assembled lateral runout. Refinish or replace the rotor as necessary. Refer to Brake Rotor Assembled Lateral Runout (LRO) Measurement. Component Tests and General Diagnostics

Installation Procedure
1. If the caliper piston is not compressed into the caliper bore, complete the following:
1.1. Place an old brake pad (2) or a block of wood against the caliper piston.
1.2. Install a large C-clamp over the body of the brake caliper.
1.3. Position the ends of the C-clamp against the rear of the caliper body and against the pad or the wood.
1.4. Tighten the C-clamp in order to compress the caliper piston into the caliper bore.
1.5. Remove the C-clamp.
2. Install the upper brake pad retainer (4) to the caliper bracket.
3. Install the lower brake pad retainer (9) to the caliper bracket.
4. Install a new inner wear indicator (3) to the inner pad (10).
5. Install a new outer wear indicator (5), if equipped, to the outer pad (6).
6. Apply disc brake insulator silicone lubricant, GM P/N 1801908, or an equivalent lubricant, to both sides of a new inner pad insulator (2).
7. Install the inner pad insulator to the inner pad.
8. Install a new inner insulator (1) to the inner pad insulator.
9. Install the inner brake pad to the caliper bracket with the wear indicator facing upward.
10. Apply disc brake insulator silicone lubricant, GM P/N 1801908, or an equivalent lubricant, to both sides of a new outer pad insulator (8).
11. Install the outer pad insulator to the outer pad (6).
12. Install a new outer insulator (7) to the outer pad insulator.
13. Install the outer brake pad to the caliper bracket.
14. Install the caliper housing (10) to the caliper bracket (14).
15. Apply wheel bearing lubricant, GM P/N 1051344 (Canadian P/N 993037), or an equivalent lubricant, to the caliper pins (17,21).

Notice: Refer to Fastener Notice in Cautions and Notices.

16. Install the caliper bolts (11,18).
Tighten
Tighten the bolts to 34.3 N.m (25.30 lb ft).
17. Install the tire and wheel assembly to the vehicle. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.
18. Lower the vehicle.
19. With the engine OFF, gradually apply and release the brake pedal several times in order to position the caliper pistons and the brake pads.
20. Fill the master cylinder fluid reservoir. Refer to Master Cylinder Reservoir Filling in Hydraulic Brakes. Master Cylinder Reservoir Filling
21. Burnish the pads and the rotors. Refer to Burnishing Pads and Rotors. Burnishing Pads and Rotors