Caution: Refer to Brake Dust Caution in the Preface section.
Removal Procedure
- Inspect the fluid level in the brake master cylinder reservoir.
- If the brake fluid level is midway between the maximum-full
point and the minimum allowable level, no brake fluid needs to be removed from the
reservoir before proceeding.
- If the brake fluid level is higher than midway between the maximum-full
point and the minimum allowable level, remove brake fluid to the midway point
before proceeding.
- Raise and suitably support the vehicle. Refer to
Lifting and Jacking the Vehicle
in General Information.
- Remove the tire and wheel assembly. Refer to
Tire and Wheel Removal and Installation
in Tires and Wheels.
- Install large C-clamp over the body of the brake caliper with the C-clamp
ends against the rear of the caliper body and against the outboard brake
pad.
- Tighten the C-clamp evenly until the caliper pistons are compressed
into the caliper bores enough to allow the caliper to slide past the brake
rotor.
- Remove the C-clamp from the caliper.
- To loosen the brake caliper lower pin bolt,
hold the brake caliper guide pin with a wrench.
- Remove the brake caliper pin bolt.
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.
- Pivot the brake caliper body (1) upward and secure the
caliper out of the way with heavy mechanic's wire or equivalent; ensure that
there is no tension on the hydraulic brake flexible hose. Do NOT disconnect
the hydraulic brake flexible hose from the caliper.
- Remove the brake pads (1) from
the caliper bracket.
- Remove and inspect the brake pad retainers from the caliper bracket.
Installation Procedure
- Inspect the brake caliper guide pin bolts. If damaged or corroded
replace the brake caliper guide bolts.
- Inspect the brake caliper guide pins. If damaged, or corroded replace
the brake caliper guide pin. Do not attempt to clean away any corrosion.
Refer to
Front Disc Brake Hardware Replacement
.
- Inspect the brake caliper guide pin boots for cuts, tears, or deterioration.
If damaged, replace the brake caliper guide pin boots. Refer to
Front Disc Brake Hardware Replacement
.
- Inspect the brake caliper piston boot for deterioration, replace
if damaged. Refer to
Front Brake Caliper Overhaul
.
- Install a large C-clamp (1)
over the body of the brake caliper (3), with the C-clamp ends against
the rear of the caliper body and against an old inboard brake pad (2)
or a wood block installed against the caliper pistons.
- Tighten the C-clamp (1) evenly until the caliper pistons are
compressed completely into the caliper bores.
- Remove the C-clamp and the old brake pad or wood block from the caliper.
- Install the brake pad retainers to
the caliper bracket.
- Install the brake pads (1) to the caliper bracket.
- Pivot the brake caliper (1) downward, over the brake pads
and into the caliper bracket.
Important: If reusing the lower caliper pin bolt, the threads of the lower caliper pin
bolt and the threads of the caliper bracket mounting holes must be free of residue
and debris prior to application of threadlocker in order to ensure proper adhesion
and fastener retention.
- If reusing the caliper pin bolts prepare the bolt and the threaded hole for
assembly:
• | Thoroughly clean the residue from the bolt threads by using denatured
alcohol or equivalent and allow to dry. |
• | Thoroughly clean the residue from the threaded holes by using denatured
alcohol or equivalent and allow to dry. |
- Apply threadlocker GM P/N 12345493 (Canadian P/N 10953488),
or equivalent to two-thirds of the threaded length of the lower caliper pin bolt.
Ensure that there are no gaps in the threadlocker along the length of the filled
area of the bolt.
- Allow the threadlocker to cure approximately ten minutes before installation.
- Apply a thin coat of high temperature silicone lube to the front brake
caliper guide pin.
Notice: Refer to Fastener Notice in the Preface section.
- Install the lower brake caliper pin bolt.
Tighten
Hold the lower brake caliper guide pin with a wrench and tighten the lower
brake caliper pin bolt to 63 N·m (46 lb ft).
- Install the tire and wheel assembly. Refer to
Tire and Wheel Removal and Installation
in Tires and Wheels.
- Lower the vehicle.
- With the engine OFF, gradually apply the brake pedal to approximately 2/3
of its travel distance.
- Slowly release the brake pedal.
- Wait 15 seconds, then repeat steps 15 and 16 until
a firm brake pedal apply is obtained; this will properly seat the brake caliper
pistons and brake pads.
- Fill the brake master cylinder reservoir to the proper level. Refer
to
Master Cylinder Reservoir Filling
in Hydraulic
Brakes.
- Burnish the pads and rotors. Refer to
Brake Pad and Rotor Burnishing
.