Chevrolet Silverado / GMC Sierra. Manual — part 2376

1. With the tire and wheel assemblies removed and the brake rotors retained by wheel lug nuts,

visually inspect the caliper piston dust boot (2) sealing area to ensure that there are no brake
fluid leaks.

2. If any evidence of a brake fluid leak is present, the brake caliper requires overhaul or

replacement.

3. While the brake system is at rest (4), observe the position of the caliper piston (1) in relation

to the caliper housing.

4. Have an assistant apply and release the brake pedal several times while you observe the

operation of the hydraulic brake caliper.

1. Observe the caliper piston (1) for unrestricted and even movement during each apply

of the brake system (5).

2. Observe the caliper piston (1) for an unrestricted and even return motion during each

release of the brake system (6).

5. If the caliper piston (1) did not exhibit unrestricted and even movement during brake system

apply and/or release, the piston square seal (3) may be worn or damaged and the caliper
may require overhaul or replacement.

BRAKE PIPE AND HOSE INSPECTION

1. Visually inspect all of the brake pipes for the following conditions:

Kinks, improper routing, missing or damaged retainers

Leaking fittings, excessive corrosion

2. If any of the brake pipes exhibited any of the conditions listed, then the identified pipe, or

pipes, require replacement.

3. Ensure that the vehicle axles are properly supported at ride height in order to maintain the

proper relationship of the flexible brake hoses to the chassis.

CAUTION: Refer to Brake Fluid Irritant Caution .

NOTE:

Refer to Brake Fluid Effects on Paint and Electrical
Components Notice .

CAUTION: Refer to Brake Fluid Irritant Caution .

NOTE:

Refer to Brake Fluid Effects on Paint and Electrical Components
Notice .

2008 Chevrolet Silverado 1500

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

Fig. 5: Identifying Flexible Brake Hose Failure Conditions
Courtesy of GENERAL MOTORS CORP.

4. Visually inspect all of the flexible brake hoses for the following conditions:

Kinks (1), improper routing, twists, chafing, missing or damaged retainers

Leaking connections, cracking, dry-rot, blisters, bulges

5. If any of the flexible brake hoses exhibited any of the conditions listed, then the identified

flexible brake hose, or hoses require replacement.

6. Squeeze the flexible brake hoses with firm finger pressure to check for soft spots (2),

indicating an internal restriction. Check the entire length of each flexible brake hose.

7. If any of the flexible brake hoses were found to have soft spots (2), then the identified

flexible brake hose, or hoses require replacement.

BRAKE PEDAL PUSHROD INSPECTION

2008 Chevrolet Silverado 1500

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