Check brake fluid levels before replacing the rear Brake Caliper Bracket. When the fluid sits midway the reservoir marks you can work without draining but if it reaches the top lower it to center position. Position a large c-clamp over the top of the caliper with the piston in toward the back of the outboard pad and use the clamp to fully retract the caliper pistons. Use mechanic's wire to hold up the brake caliper while you unscrew its bolts from the bracket. Keep the hydraulic brake hose attached without breaking it throughout the process. Start by taking away
Brake Pads, anti-rattle clips, and bolts from the Brake Caliper Bracket before disconnecting the bracket. Wipe contaminants off the ends of the bracket and check both the mounting area and threads for dirt. Before putting on the new Brake Caliper Bracket clean the bolt threads with denatured alcohol then apply threadlocker gm p/n 12345493 (Canadian P/N 10953488) to both threads. Attach the Brake Caliper Bracket bolts first then tighten them to 200 nm (148 ft. Lbs.) and fix the anti-rattle clips before placing and fastening the new brake pads on the bracket. Put the brake caliper on the bracket then fasten it with brake bolts at 42 nm (31 ft-lbs) torque and install the wheel and tire unit. When the engine is off depress the brake pedal to two-thirds of its range and ease off before repeating to place the pistons and pads correctly into position. Insert new brake fluid to reach the correct mark in the master cylinder reservoir only when the fluid level drops. Keep the reservoir fresh with clean brake fluid.