Chevrolet Silverado / GMC Sierra. Service manual — part 1527

REAR DISC BRAKE BACKING PLATE REPLACEMENT (JD9)

Fig. 53: View Of Disc Brake Backing Plate
Courtesy of GENERAL MOTORS CORP.

Callout

Component Name

Preliminary Procedures

1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .

2. Remove the tire and wheel assembly. Refer to Tire and Wheel Removal and

Installation .

3. Remove the wheel hub and bearing assembly. Refer to Front Wheel Hub, Bearing,

and Seal Replacement (2500) or Front Wheel Hub, Bearing, and Seal
Replacement (1500) .

CAUTION:

Refer to Brake Dust Caution .

1

Disc Brake Splash Shield

Callout

Component Name

CAUTION:

Refer to Brake Dust Caution .

2008 Chevrolet Silverado 1500

2008 BRAKES Disc Brakes - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado

REAR DISC BRAKE BACKING PLATE REPLACEMENT (JH6, JH7)

Fig. 54: View Of Disc Brake Backing Plate, Nuts & Bolts
Courtesy of GENERAL MOTORS CORP.

Preliminary Procedures

1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .

2. Remove the tire and wheel assembly. Refer to Tire and Wheel Removal and

Installation .

3. Remove the axle shaft. Refer to Rear Axle Shaft Replacement (8.6 Inch Axle

w/Drum Brake w/VSES) or Rear Axle Shaft Replacement (8.6 Inch Axle
w/Drum Brakes w/o VSES) or Rear Axle Shaft Replacement (8.6, 9.5 Inch Axles
w/VSES) .

4. Remove the park brake backing plate. Refer to Park Brake Backing Plate

Replacement .

1

Disc Brake Backing Plate

2008 Chevrolet Silverado 1500

2008 BRAKES Disc Brakes - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado

BRAKE ROTOR ASSEMBLED LATERAL RUNOUT CORRECTION

Review the following acceptable methods for bringing the brake rotor assembled LRO to within

Callout

Component Name

Preliminary Procedures

1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .

2. Remove the tire and wheel assembly. Refer to Tire and Wheel Removal and

Installation .

3. Remove the rear axle hub. Refer to Rear Axle Hub, Bearing, Cup, and/or Seal

Replacement .

4. Remove the park brake shoes. Refer to Parking Brake Shoe Replacement (JD9) or

Parking Brake Shoe Replacement (JH6, JH7) .

5. Remove the park brake actuator. Refer to Parking Brake Actuator Replacement

(JD9) .

CAUTION:

Refer to Brake Dust Caution .

1

Backing Plate Nut (Qty 4)

Tighten: 225 N.m (166 lb ft)

NOTE:

Refer to Fastener Notice .

2

Backing Plate Bolt (Qty 4)

3

Disc Brake Backing Plate

IMPORTANT:

Brake rotor thickness variation MUST be checked BEFORE
checking for assembled lateral runout (LRO). Thickness
variation exceeding the maximum acceptable level can cause
brake pulsation. Refer to Brake Rotor Thickness Variation
Measurement.

Brake rotor assembled lateral runout (LRO) exceeding the
maximum allowable specification can cause thickness
variation to develop in the brake rotor over time, usually
between 4 800-11 300 km (3,000-7,000 mi). Refer to Brake
Rotor Assembled Lateral Runout Measurement.

2008 Chevrolet Silverado 1500

2008 BRAKES Disc Brakes - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado

specifications. Determine which method to use for the specific vehicle being repaired.

Brake Rotor Assembled Lateral Runout Correction - Indexing

The indexing method of correcting assembled LRO is most effective when the LRO
specification is only exceeded by a relatively small amount: 0.025-0.127 mm (0.001-0.005
in). Indexing is used to achieve the best possible match of high spots to low spots between
related components.

Brake Rotor Assembled Lateral Runout Correction - On Vehicle Lathe

The on-vehicle brake lathe method is used to bring the LRO to within specifications through
compensating for LRO while refinishing the brake rotor.

If the assembled LRO cannot be corrected using these methods, then other components must be
suspected as causing and/or contributing to the LRO concern.

BRAKE ROTOR ASSEMBLED LATERAL RUNOUT CORRECTION - INDEXING

Tools Required

J 39544-KIT Torque-Limiting Socket Set, or equivalent. See Special Tools.

J 45101-100 Conical Brake Rotor Washers. See Special Tools.

Correction

CAUTION: Refer to Brake Dust Caution .

IMPORTANT:

Brake rotor thickness variation MUST be checked BEFORE
checking for assembled lateral runout (LRO). Thickness
variation exceeding the maximum acceptable level can cause
brake pulsation. Refer to Brake Rotor Thickness Variation
Measurement.

Brake rotor assembled LRO exceeding the maximum
allowable specification can cause thickness variation to
develop in the brake rotor over time, usually between 4 800-
11 300 km (3,000-7,000 mi). Refer to Brake Rotor Assembled
Lateral Runout Measurement.

2008 Chevrolet Silverado 1500

2008 BRAKES Disc Brakes - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado