How to Replace a Caliper in a GMC Sierra

Replacing a major part on any car, like a brake caliper on a GMC Sierra, is not an easy task. The chassis of a Sierra is pretty much the same as the Chevy Silverado, so similar parts can be used. However, consult your mechanic or an expert before taking on such important repairs.

Instructions

1

Raise the vehicle up on the jack stand. Drain two-thirds of the brake fluid from the master cylinder. Remove the tire and wheel assembly.

2

Disconnect the brake hose from the caliper by removing the fitting bolt. Throw away the washers that are with the bolt. Plug the hose with a piece of rubber.

3

Remove the caliper mounting bolts and slide the caliper off the body. You will need to remove the outer shell of the mounting bracket to remove a rear caliper.

4

Install the new caliper onto the rotor or bracket. Attach the caliper mounting bolts and tighten them to 31 foot pounds for the front and 74 foot pounds for the back on a 15 series, and 80 foot pounds for both ends on the 25 series.

5

Connect the brake hose to the caliper. Use new washers with the inlet fitting bolt. Tighten the bolt to 33 foot pounds.

6

Bleed the brake system. Open the bleeder valve, attach a transparent hose to it and have another person depress the pedal to remove the air.

7

Reattach the wheel and lower the car. Pump the brake until it feels firm and road test the vehicle.