Brake calipers on the Sierra clout the brake pads, which operate friction to the rotors during braking.
Usual Motors Gathering (GMC) equipped late-model Sierras with front and rear hydraulic CD brakes. Pressurized brake fluid from the brake skilled cylinder causes the pistons in the brake calipers to expand and clamp the brake pads onto the rotor. Brake pads, prepared from a composite friction counsel that wears with operate, are considered a average wear objective and demand periodic maintenence. GMC brake pads equipped with indicator tabs practise a squealing din when the brakes are applied on pads that are in desideratum of replacement.
Instructions
Removal
1. Hoist the front (or rear) of the vehicle with a jack. Advice the vehicle securely with a team of jack stands.
2. Remove the lug nuts from the circle with a lug-nut wrench. Pull the rotate off the hub.
3. Unlatched the hood. Remove the masterly cylinder reservoir include by artisan. Certify that the fluid consistent is no higher than the maximum plentiful comparable signal on the reservoir. Remove excess fluid before proceeding provided crucial.
4. Install two C-clamps on the caliper so that they bear on the back of the caliper and the outer brake pad. Tighten the C-clamps until the caliper pistons are compressed fully into the caliper reason. Loosen the C-clamps and remove them from the caliper.
5. Remove the lower caliper bolt with a wrench. Rotate the caliper on the upper caliper bolt until the caliper is rainless of the rotor.
6. Remove the broken down pads from the caliper by share. Remove and discard the exhausted anti-rattle clips from the caliper bracket.
Slowly apply brake pressure with the brake pedal until it is 2/3 of the way to the floor. Slowly release the brake pedal and wait 15 seconds. Repeat this process until the brake pedal is firm. Check and top off the fluid level in the reservoir and install the cap by hand.
City the pad with the squeal tab to the inside of the caliper.
8. Rotate the caliper down and into position over the pads and the caliper bracket. Install the lower caliper bolt and torque it to 74 foot-pounds with a 3/8-inch torque wrench and socket.
9. Install the tire onto the hub. Install the lug nuts and torque them to 140 foot-pounds with a 1/2-inch torque wrench and socket using a cross-pattern.
10. Raise the vehicle with a jack. Remove the jack stands and lower the vehicle to the ground.
11.
