GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Was the Hydraulic Brake System Diagnostic Check performed?

--

Go to Step 2

Go to Hydraulic Brake Diagnostic System Check

2

Inspect the disc brake pads and brake shoe linings for the following:

    • Excessive wear
    • Uneven wear
    • Abuse
    • Contaminated lining material
    • Incorrect lining material

Refer to Brake Pad Inspection in Disc Brakes or Brake Shoe Inspection in Drum Brakes.

Do any of the above conditions apply?

--

Go to Step 3

Go to Step 4

3

Replace the brake linings. Refer to Brake Pads Replacement in Disc Brakes or Brake Lining Replacement in Drum Brakes.

Is the repair complete?

--

Go to Step 8

--

4

Inspect the brake rotors for the following

    • Hot spots
    • Scored rotor surface
    • Grooved rotor surface

Refer to Brake Rotor Thickness Variation Check in Disc Brakes.

Do any of the above conditions apply?

--

Go to Step 5

Go to Step 6

5

  1. Refinish the brake rotor. Refer to Brake Rotor Refinishing in Disc Brakes.
  2. If refinishing the brake rotor results in a thickness that is less than the thinnest (Refinishing) thickness, replace the rotor. Refer to Brake Rotor Replacement in Disc Brakes.

Is the repair complete?

--

Go to Component Specifications is Disc Brakes

Go to Step 8

6

Inspect brake assembly for loose, broken, or missing components. Refer to Brake Pad Inspection in Disc Brakes or Brake Drum Inspection in Drum Brakes.

Are there any loose, broken, or missing brake assembly components?

--

Go to Step 7

Go to Hydraulic Brake Diagnostic System Check

7

Tighten or replace the loose, broken or missing brake assembly components. Refer to Brake Pads Replacement in Disc Brakes or Brake Lining Replacement in Drum Brakes.

Is the repair complete?

--

Go to Step 8

--

8

Verify proper brake system operation.

Does the original condition still exist?

--

Verify the customer complaint. Begin the diagnosis again. Go to Step 1.

Go to Hydraulic Brake Diagnostic System Check