Hummer H3. Manual — part 1310

BRAKING ACTION UNEVEN - PULLS TO ONE SIDE

Test Description

The numbers below refer to the step numbers on the diagnostic table.

4: Suspension components that are not operating properly may cause a disturbance to the
vehicle during application of the brake system.

5: Steering components that are not operating properly may cause a disturbance to the
vehicle during application of the brake system.

Braking Action Uneven - Pulls to One Side

Step

Action

Yes

No

DEFINITION: Vehicle pulls to one side 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 hydraulic brake system

for the following conditions.

Kinked, pinched or damaged
brake pipe or flexible brake
hose

Sticking or improperly
operating caliper piston

Brake fluid leak

2. Adjust, repair or replace

components as necessary. Refer to
Hydraulic Brake System
Diagnosis.

Did you find and correct a condition?

Go to Step 6

Go to Step 3

1. Inspect the disc brake system for the

following conditions.

Contaminated linings

Glazed linings

Distorted, cracked or damaged

2007 Hummer H3

2007 BRAKES Hydraulic Brakes - H3

3

linings on one side

Loose, damaged or missing
caliper hardware and/or lining
hardware

Incorrect linings on one side

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

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 6

Go to Step 4

4

1. Inspect the suspension system for the

following conditions.

Incorrect tire pressures

Loose suspension component
connections

Excessively worn or damaged
suspension components

2. Adjust, repair or replace

components as necessary. Refer to
Diagnostic Starting Point -
Suspension General Diagnosis .

Did you find and correct a condition?

Go to Step 6

Go to Step 5

5

1. Inspect the steering system for the

following conditions.

Loose steering component
connections

Excessively worn or damaged
steering components

2007 Hummer H3

2007 BRAKES Hydraulic Brakes - H3

BRAKING ACTION UNEVEN - FRONT TO REAR

Test Descriptions

The number below refers to the step number on the diagnostic table.

4: Suspension components that are not operating properly may cause a disturbance to the
vehicle during application of the brake system.

Braking Action Uneven - Front to Rear

2. Adjust, repair or replace

components as necessary. Refer to
Diagnostic Starting Point - Power
Steering System .

Did you find and correct a condition?

Go to Step 6

Go to
Diagnostic
Starting Point -
Hydraulic
Brakes

6

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: Braking action or stopping force sensitive or grabbing and/or more
pronounced at the front or at the rear axle. Sensitive or grabbing brakes: Excessive brake
jump-in force relative to brake pedal input.

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 hydraulic brake system for

the following conditions:

Improper operation of caliper
pistons

Kinked, pinched or damaged

2007 Hummer H3

2007 BRAKES Hydraulic Brakes - H3

2

brake pipe or flexible brake hose

Brake fluid leak

Improperly functioning
proportion valve, if equipped

Improper operation of dynamic
rear proportion (DRP) system, if
equipped

2. Adjust, repair or replace components

as necessary. Refer to Hydraulic
Brake System Diagnosis.

Did you find and correct a condition?

Go to Step 6

Go to Step 3

3

1. Inspect the disc brake system for the

following conditions:

Contaminated linings

Glazed linings

Distorted, cracked or damaged
linings

Excessively worn linings

Aftermarket linings

Damaged or excessively worn
caliper hardware and/or lining
hardware

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

Glazed 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 6

Go to Step 4

1. Inspect the suspension system for the

following conditions:

Loose suspension component
connections

2007 Hummer H3

2007 BRAKES Hydraulic Brakes - H3