GM Service Manual Online
For 1990-2009 cars only

Brake System Noise Brakes Applied

Step

Action

Yes

No

1

Was the Hydraulic Brake Diagnostic System Check performed?

Go to Step 2

Go to Diagnostic System Check - Hydraulic Brakes

2

Inspect the brake linings for the following:

Refer to Brake Pad Inspection in Disc Brakes:

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

Do any of the above conditions exist?

Go to Step 3

Go to Step 4

3

Replace the brake linings as necessary. Refer to the appropriate procedure in Disc Brakes.

Did you complete the repair?

Go to Step 8

--

4

Inspect the brake rotors for the following:

    • Hot spots
    • Scored rotor surface
    • Grooved rotor surface

Refer to Brake Rotor Wear Tolerance Test .

Do any of the above conditions exist?

Go to Step 5

Go to Step 6

5

Resurface or replace the brake rotor as necessary. Refer to the appropriate procedure in Disc Brakes.

Did you complete the repair?

Go to Step 8

--

6

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

Are there any loose, broken or missing attachments?

Go to Step 7

Go to Diagnostic System Check - Hydraulic Brakes

7

Repair or replace the components as necessary.

Did you complete the repair?

Go to Step 8

--

8

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2

Brake System Noise Brakes not Applied

Step

Action

Yes

No

1

Was the Hydraulic Brake Diagnostic System Check performed?

Go to Step 2

Go to Diagnostic System Check - Hydraulic Brakes

2

Inspect the brake linings for the following:

Refer to Brake Pad Inspection in Disc Brakes.

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

Do any of the above conditions exist?

Go to Step 3

Go to Step 4

3

Replace the brake linings as necessary. Refer to the appropriate procedure in Disc Brakes.

Did you complete the repair?

Go to Step 8

--

4

Inspect the brake rotors for the following:

    • Hot spots
    • Scored rotor surface
    • Grooved rotor surface

Refer to Brake Rotor Wear Tolerance Test .

Do any of the above conditions exist?

Go to Step 5

Go to Step 6

5

Resurface or replace the brake rotor as necessary. Refer to the appropriate procedure in Disc Brakes.

Did you complete the repair?

Go to Step 8

--

6

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

Are there any loose, broken or missing attachments?

Go to Step 7

Go to Diagnostic System Check - Hydraulic Brakes

7

Repair or replace the components as necessary.

Did you complete the repair?

Go to Step 8

--

8

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2