GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Was the Hydraulic Brake Diagnostic System 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 conditions:

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

Refer to Brake Pad Inspection in Disc Brakes.

Do any of the above conditions apply?

--

Go to Step 3

Go to Step 4

3

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

Is the repair complete?

--

Go to Step 18

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4

Inspect the brake rotors for the following:

    • Hot spots
    • Scored rotor surface
    • Grooved rotor surface
    • Excessive lateral runout
    • Excessive thickness variation

Refer to the appropriate procedure in Disc Brakes:

    •  Brake Rotor Tolerance

Do any of the above conditions apply?

--

Go to Step 5

Go to Step 6

5

  1. Inspect the thickness of the rotor. Refer to Component Specifications in Disc Brakes.
  2. Resurface the brake rotor. Refer to Brake Rotor Refinishing in Disc Brakes.

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

Is the repair complete?

--

Go to Step 18

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6

Inspect the brake assemblies for missing or loose attachments.

Are there any missing or loose attachments?

--

Go to Step 7

Go to Step 8

7

Replace or tighten the attachments as necessary.

Is the repair complete?

--

Go to Step 18

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8

Inspect the calipers for leakage.

Are any of the components leaking?

--

Go to Step 9

Go to Step 10

9

Replace the leaking components. Refer to the appropriate procedure in Disc Brakes:

Is the repair complete?

--

Go to Step 18

--

10

Inspect the hydraulic brake system for leaks. Refer to Brake Fluid Leak .

Is there any sign of leakage?

--

Go to Step 11

Go to Step 12

11

Replace the leaking components or tighten the leaking brake hose or pipe fittings. Refer to Fastener Tightening Specifications .

Is the repair complete?

--

Go to Step 18

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12

Inspect the master cylinder for leakage. Refer to Master Cylinder Diagnosis .

Is the master cylinder leaking?

--

Go to Step 13

Go to Step 14

13

Overhaul or repair the master cylinder. Refer to Master Cylinder Replacement .

Is the repair complete?

--

Go to Step 18

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14

Inspect the brake system for air. Refer to Antilock Brake System Automated Bleed Procedure .

Is there air in the system?

--

Go to Step 15

Go to Step 16

15

Bleed the brake system. Refer to Antilock Brake System Automated Bleed Procedure .

Is the repair complete?

--

Go to Step 18

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16

Inspect the brake fluid for contamination.

Is the brake fluid contaminated?

--

Go to Step 17

Go to Step 18

17

Flush the hydraulic brake system. Refer to Hydraulic Brake System Flushing .

Is the repair complete?

--

Go to Step 18

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18

Verify the proper brake system operation.

Does the brake system operate properly?

--

System OK

Go to Hydraulic Brake Diagnostic System Check