GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the Brake System Diagnosis?

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Go to Step 2

Go to Brake System Diagnosis

2

Perform the brake pedal travel measurement procedure. Refer to Brake Pedal Travel .

Does the brake pedal travel exceed the specified measurement?

--

Go to Step 3

System OK

3

Inspect the brake 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 exist?

--

Go to Step 4

Go to Step 5

4

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

Did you complete the repair?

--

Go to Step 19

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5

Inspect the brake rotors for the following conditions:

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

Refer to Brake Rotor Lateral Runout Check in Disc Brakes.

Do any of the above conditions exist?

--

Go to Step 6

Go to Step 7

6.

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

Did you complete the repair?

--

Go to Step 19

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7

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

Are there any missing or loose attachments?

--

Go to Step 8

Go to Step 9

8

Repair or replace the components as necessary.

Did you complete the repair?

--

Go to Step 19

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9

Inspect the calipers for leakage.

Are any of the components leaking?

--

Go to Step 10

Go to Step 11

10

  1. Replace the leaking components.
  2. Repair or replace the brake calipers. Refer to the appropriate procedures in Disc Brakes:

Did you complete the repair?

--

Go to Step 19

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11

Inspect the hydraulic brake system for leaks. Refer to the appropriate procedure:

    •  Brake Fluid Leak .

Is there any sign of leakage?

--

Go to Step 12

Go to Step 13

12

Repair or replace the components as necessary.

Did you complete the repair?

--

Go to Step 19

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13

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

Is the master cylinder leaking?

--

Go to Step 14

Go to Step 15

14

Repair or replace the master cylinder. Refer to the appropriate procedure:

    •  Master Cylinder Overhaul .

Did you complete the repair?

--

Go to Step 19

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15

Inspect the brake system for air. Refer to Hydraulic Brake System Bleeding .

Is there air in the system?

--

Go to Step 16

Go to Step 17

16

Bleed the brake system. Refer to Hydraulic Brake System Bleeding .

Did you complete the repair?

--

Go to Step 19

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17

Inspect the brake fluid for contamination. Refer to Master Cylinder Reservoir Filling .

Is the brake fluid contaminated?

--

Go to Step 18

Go to Step 19

18

Replace all of the hydraulic brake system rubber components.

  1. Flush the hydraulic brake system. Refer to Hydraulic Brake System Flushing .
  2. Replace all of the hydraulic brake system rubber components. Refer to the appropriate procedure:
  3. •  Brake Pressure Modulator Valve Replacement in Antilock Brake System
  4. Flush the hydraulic brake system. Refer to Hydraulic Brake System Flushing .
  5. Bleed the brake system. Refer to Hydraulic Brake System Bleeding .

Did you complete the repair?

--

Go to Step 19

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19

Operate the system in order to verify the repair.

Did you correct the condition?

--

System OK

Go to Step 2