The calipers are a single piston design that mount to anchor brackets with 2 pin bolts. The anchor bracket mounts to the steering knuckle (front) and the lower control arm (rear) with 2 bolts. Hydraulic pressure, created when the brake pedal is depressed, acts equally against the piston and the bottom of the caliper bore to move the piston outward and to slide the caliper inward. This action forces both pads against the rotor, creating friction to stop the vehicle.

When the brake pedal is released, line pressure is released and the caliper piston seal retracts the piston. This results in the pads releasing from the rotor.

GM replacement brake lining material is recommended for all GM vehicles to maintain the balance between front and rear brake performance. GM replacement brake parts have been carefully selected to provide the proper brake balance for purposes of both stopping distance and controllability over the full range of operation conditions. Installation of front or rear brake lining material with performance different from that of the GM replacement parts recommended for this vehicle can change the intended brake balance of this vehicle.