How to Replace the Rotor in a GMC Sierra

When your GMC Sierra shudders and pulses to a stop, you know it's time to get new rotors. Rotors, also known as brake discs, only need to be changed if they get warped or too worn down and can't be resurfaced. Luckily, the process is simple and you can do it yourself in your own garage.

Instructions

1

Drain two thirds of the brake fluid from the brake cylinder. Then jack up your GMC Sierra using jacks and jack stands. Be sure to block the wheels to keep your truck from rolling while you work. Remove the first tire and wheel assembly.

2

Insert a screwdriver through the brake caliper into the brake rotor vane. This keeps the rotor from turning while you mark the position of the front wheel extension on the hub. You should do the same for the position of the old rotor on the hub.

3

Unfasten the caliper mounting bolts and then hang the caliper and attached brake line out of the way with mechanic's wire. Be careful not to disconnect the brake line.

4

Remove the old rotor and then clean the area around the hub with a damp cloth. Install the new rotor and tighten the holding screws.

5

Discard the wire and bolt the caliper assembly back into position with a torque wrench. Replace the wheel assembly and tire and move to repeat this process for each additional rotor.

6

Lower your truck when you've finished installing the new rotors. Tighten and torque the lug nuts and then refill the master cylinder with new brake fluid.

7

Pump the brake on your Sierra until you get a firm pedal and be sure to road test your GMC to make sure everything is in good working order.