Content .. 2362 2363 2364 2365 ..
Chevrolet Silverado / GMC Sierra. Manual - part 2364
BRAKE PEDAL EXCESSIVE EFFORT
components?
Go to Step 8
Go to Step 7
7
1. Inspect the brake assist system for the
following conditions:
Vacuum leaks and/or improperly
operating check valve, if equipped
with vacuum assist
Damaged or improperly operating
brake booster assembly
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 8
Go to Diagnostic
Starting Point -
Hydraulic
Brakes
8
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: Brake pedal requires an increased amount of input from the driver to obtain
good braking action and/or stopping distance is increased.
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 brake assist system for the
following conditions:
Vacuum leaks, if equipped with
vacuum power assist
Lack of lubrication, binding or
excessively worn pushrod or pedal
pivots or pivot bushings
2008 Chevrolet Silverado 1500
2008 BRAKES Hydraulic Brakes - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
2
Bent or damaged pedal pushrod,
pedal, or pedal bracket
Damaged or improperly operating
brake booster assembly
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 5
Go to Step 3
3
1. Inspect the hydraulic brake system for the
following conditions:
Binding caliper pistons
Internally damaged flexible brake
hoses; hindering fluid flow
External brake fluid leaks
Kinked or damaged flexible brake
hoses and/or pipes
Internal brake fluid leaks; improperly
operating master cylinder
Poor brake fluid quality; low boiling
point
2. Adjust, repair or replace components as
necessary. Refer to Hydraulic Brake
System Diagnosis.
Did you find and correct a condition?
Go to Step 5
Go to Step 4
1. Inspect the disc brake system for the
following conditions:
Excessively worn linings
Glazed linings
Cracked, distorted or damaged
linings
Contaminated linings
Binding, 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
BRAKES DRAG
4
Lack of lubrication or excessive
corrosion on metal to metal contact
surfaces
Excessively worn or corroded rotor
friction surfaces
Glazed rotor friction surfaces
Hard spots, heat checks, blueing
discoloration of rotor friction
surfaces
2. Adjust, repair or replace components as
necessary. Refer to Disc Brake System
Diagnosis.
Did you find and correct a condition?
Go to Step 5
Go to Diagnostic
Starting Point -
Hydraulic
Brakes
5
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: Brake system does not fully release or has delayed release; vehicle motion
may be hindered by brake system without applying brakes.
1
Were you sent here from the Hydraulic Brake
Symptom table?
Go to Step 2
Go to Diagnostic
Starting Point -
Hydraulic
Brakes
2
Is the vehicle equipped with an adjustable stop
lamp switch and/or an adjustable cruise control
release switch?
Go to Step 3
Go to Step 4
1. Inspect the stop lamp switch for proper
adjustment to ensure that the brake pedal is
fully releasing.
2008 Chevrolet Silverado 1500
2008 BRAKES Hydraulic Brakes - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
3
2. Inspect the cruise control release switch, if
equipped, for proper adjustment to ensure
that the brake pedal is fully releasing.
Did you find and correct a condition?
Go to Step 14
Go to Step 4
4
Is the vehicle equipped with a drum-in-rotor
type of park brake system?
Go to Step 5
Go to Step 7
5
Ensure the park brake shoes are not adjusted too
tightly, possibly causing drag under certain
conditions.
Are the park brake shoes adjusted too tightly?
Go to Step 6
Go to Step 7
6
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 and
heat spots.
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 14
Go to Step 7
7
Inspect the park brake system for proper
operation. Refer to Park Brake System
Diagnosis .
Did you find and correct a condition?
Go to Step 14
Go to Step 8
8
1. Inspect the disc brake system for the
following conditions:
Binding, incorrectly installed or
missing caliper hardware and/or
lining hardware-Ensure free
movement of linings and of caliper, if
equipped with sliding type caliper
Lack of lubrication or excessive
corrosion on metal to metal contact
surfaces
Distorted or damaged linings
Damaged or excessively worn caliper
2008 Chevrolet Silverado 1500
2008 BRAKES Hydraulic Brakes - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Content .. 2362 2363 2364 2365 ..