GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2009 🢒 Envoy - 2WD 🢒 Brakes 🢒 Hydraulic Brakes 🢒 Braking Action Uneven - Pulls to One Side

Test Description

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

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

    2.

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

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.
    2. • 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

3
  1. Inspect the disc brake system for the following conditions.
    2. • Contaminated linings
    • Glazed linings
    • Distorted, cracked or damaged 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.
    2. • 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.
    2. • Loose steering component connections
    • Excessively worn or damaged steering components
  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