Chevrolet Silverado / GMC Sierra. Service manual — part 2361

Repair Procedures

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Brake Fluid Level Indicator Switch Replacement (JD9, JF3, JF7)

Parking Brake Indicator Switch Replacement

Control Module References for BCM and IPC replacement, setup, and programming

BRAKE PULSATION

Step

Action

Yes

No

DEFINITION: Fluctuation or pulsation is felt through the brake pedal, steering wheel, seat,
floor, and/or in the vehicle ONLY when braking.

1

Were you sent here from the Hydraulic Brake
Symptom table?

Go to Step 2

Go to Diagnostic
Starting Point -
Hydraulic
Brakes

2

1. Inspect the disc brake system for the

following conditions.

Excessive thickness variation of rotor
friction surfaces

Excessive assembled lateral runout
(LRO) of rotor friction surfaces

Hard spots, heat checks, bluing
discoloration of rotor friction
surfaces; possibly due to brake drag

Excessive corrosion of rotor friction
surfaces; including red, gray or black
oxidation

Loose, damaged or missing caliper or
lining hardware

Bent or damaged caliper or mounting
component

Excessive LRO of wheel hub/axle
flange; due to damage and/or loose or
excessively worn bearings

2. Adjust, repair or replace components as

2008 Chevrolet Silverado 1500

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

BRAKE SYSTEM NOISE

necessary. Refer to Disc Brake System
Diagnosis.

Did you find and correct a condition?

Go to Step 3

Go to Diagnostic
Starting Point -
Hydraulic
Brakes

3

1. Install or connect components that were

removed or disconnected during diagnosis.

2. Road test the vehicle in order to confirm

proper operation. Refer to Brake System
Vehicle Road Test.

Is the condition still present?

Go to Step 2

System OK

Step

Action

Yes

No

DEFINITION: Vehicle exhibits abnormal noise when braking; vehicle may exhibit
abnormal noise during motion just after brake pedal release.

1

Were you sent here from the Hydraulic Brake
Symptom table?

Go to Step 2

Go to Diagnostic
Starting Point -
Hydraulic
Brakes

1. Inspect the disc brake system for the

following conditions.

Lining wear indicator contact with
rotor

Debris trapped between rotor and
splash shield or backing plate; and/or
debris trapped between rotor and
linings

Contaminated linings

Aftermarket linings

Glazed linings

Distorted, cracked or damaged
linings

Excessively worn linings

Damaged or excessively worn caliper
hardware and/or lining hardware

2008 Chevrolet Silverado 1500

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

2

Incorrectly installed, loose or missing
caliper hardware and/or lining
hardware

Lack of lubrication or excessive
corrosion on metal to metal contact
surfaces

Bent or damaged splash shield or
backing plate

Hard spots, heat checks, blueing
discoloration of rotor friction
surfaces

Glazed rotor friction surfaces

Bent or damaged caliper or mounting
component

2. Adjust, repair or replace components as

necessary. Refer to Disc Brake System
Diagnosis.

Did you find and correct a condition?

Go to Step 9

Go to Step 3

3

1. Inspect the brake assist system for the

following conditions.

Lack of lubrication or excessively
worn pushrod or pedal pivots or pivot
bushings

Bent or damaged pedal pushrod,
pedal, or pedal bracket

Damaged or improperly operating
vacuum booster and/or check valve, if
equipped

Low power steering fluid level, if
equipped with hydraulic boost

Improperly tensioned, excessively
worn or damaged power steering belt,
if equipped with hydraulic boost

Restricted return hose from hydraulic
booster, if equipped

2008 Chevrolet Silverado 1500

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

Improperly operating hydraulic
booster, if equipped

Improperly functioning power
steering system, if equipped with a
hydraulic booster assembly

Contaminated power steering fluid, if
equipped with hydraulic boost

2. Adjust, repair or replace components as

necessary. Refer to Brake Assist System
Diagnosis (Hydraulic Assist).

Did you find and correct a condition?

Go to Step 9

Go to Step 4

4

1. Inspect the hydraulic brake system for the

following conditions.

Improper operation of caliper pistons

Contaminated brake fluid

2. Adjust, repair or replace components as

necessary. Refer to Hydraulic Brake
System Diagnosis.

Did you find and correct a condition?

Go to Step 9

Go to Step 5

5

Is the vehicle equipped with a drum-in-rotor
type of park brake system?

Go to Step 6

Go to Step 9

6

Ensure the park brake shoes are not adjusted too
tightly, possibly causing a noise under certain
conditions.
Are the park brake shoes adjusted too tightly?

Go to Step 7

Go to Step 9

7

1. Clean and inspect the park brake shoes for

excessive wear and/or damage.

2. Inspect the drum portion of the rotors for

excessive wear, blueing discoloration, heat
spots, and excessive radial runout.

3. If any of these conditions are present,

replace the affected components.

4. Adjust the park brake system.

Did you find and correct a condition?

Go to Step 9

Go to Step 8

2008 Chevrolet Silverado 1500

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