How to Make Parking Brake Adjustments in a GMC Sierraby Contributor
Make a parking brake adjustment to your GMC Sierra when the truck starts to roll with the parking brake on. Save yourself time and money by making this simple repair at home, all you need are a few tools and a place to raise your Sierra. Use this for all years of GMC Sierra trucks.
Use the Pedal
Press in on the parking brake pedal with your foot until it reaches the floor. Locate the parking brake pedal inside the driver's side of the vehicle on the very left side.
Release the pedal by pressing the pedal downwards with your foot. This automatically adjusts the parking brake cables to eliminate the slack the cables have.
Repeat Steps 1 and 2 three times to successfully adjust your GMC Sierra's parking brakes.
Adjust the Parking Brake
Raise the rear end of your vehicle by placing it on a jack stand and then moving jacks underneath.
Locate the steel threaded cables coming out of each wheel well. These connect to an adjuster nut to form one cable.
Move the adjuster nut by hand slightly. Notice the cables tighten or loosen with the adjustment. Make more of an adjustment depending on how bad your parking brake was releasing.
Release your vehicle from the jack stands and test out your parking brake adjustment.