Remove the brake caliper and the caliper mounting bracket as an assembly from the steering knuckle. Refer to Rear Brake Caliper Bracket Replacement .
Courtesy of GENERAL MOTORS COMPANY
CAUTION:
Support the brake caliper with heavy mechanic wire or equivalent, whenever it is separated from its mount and the hydraulic flexible brake hose is still connected. Failure to support the caliper in this manner will cause the flexible brake hose to bear the weight of the caliper, which may cause damage to the brake hose and in turn may cause a brake fluid leak.