The brake caliper mounting plate is used to mount all of the stationary brake components. An L or an R following the part number cast on the back of the plates indicates the left or the right side mounting. Some plates may also have an L or an R painted on the front.

1. Block the vehicle wheels.
2. Remove the brake caliper. Refer to Brake Caliper Replacement .



3. Remove the hub and brake rotor assembly. Refer to Front Wheel Hub, Bearing, and Seal Replacement .



4. Remove the bolts (1), the nuts (4), and the washers (2) of the brake mounting plate and shield, if so equipped.
5. Remove the brake caliper mounting plate (3).
6. Inspect the support rails for the following conditions:

•

Rust

•

Corrosion

•

Wear

7. Clean the rails with a wire brush if necessary.
8. Inspect the support rails for cracks or elongated bolt holes.
9. Replace the brake caliper mounting plate (3), if necessary.

1. Return the caliper mounting plate (3) to the axle flange.

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

Important: Threads must be clean and free of grease. Apply 272 Threadlocker GM P/N 12345493, or equivalent, to the threads of each brake caliper mounting bolt.

2. Install the washers, nuts, and bolts of the brake caliper mounting plate (3) and the shield.

Tighten

•	Tighten the shield bolts (if equipped) to 32 N·m (24 lb ft).

•	Tighten the brake caliper mounting plate bolts to 280 N·m (206 lb ft).




3. Install the hub and brake rotor assembly.
4. Install the brake caliper. Refer to Brake Caliper Replacement .
5. Lower the vehicle.
6. Remove the wheel blocks.