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 Brake System Diagnosis

2

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

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

Refer to Brake Pads Replacement 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 Brake Pads Replacement in Disc Brakes.

Is the repair complete?

--

Go to Step 19

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4

Inspect the brake rotors for the following:

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

Refer to Brake Rotor Lateral Runout Check .

Do any of the above conditions apply?

--

Go to Step 5

Go to Step 6

5

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 Brake Rotor Replacement and Component Specifications in Disc Brakes.

Is the repair complete?

--

Go to Step 19

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6

Inspect the axle seals for leakage.

Is there any seal leakage?

--

Go to Step 7

Go to Step 8

7

Replace the axle oil seals. Refer to Rear Hub and Bearing Replacement in Rear Drive Axle.

Is the repair complete?

--

Go to Step 19

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8

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 9

Go to Step 10

9

Replace or tighten the attachments as necessary.

Is the repair complete?

--

Go to Step 19

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10

Replace the leaking components. Refer to Brake Caliper Replacement in Disc Brakes .

Is the repair complete?

--

Go to Step 19

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11

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

Is there any sign of leakage?

--

Go to Step 12

Go to Step 13

12

Tighten the brake hose or pipe fittings. Refer to Fastener Tightening Specifications .

Is the repair complete?

--

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 Step14

Go to Step 15

14

Overhaul the master cylinder. Refer to Master Cylinder Overhaul .

Is the repair complete?

--

Go to Step 19

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15

Inspect the brake system for air. Refer to Brake Fluid and Brake Fluid Handling .

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 .

Is the repair complete?

--

Go to Step 19

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17

Inspect the brake fluid for contamination. Refer to Brake Fluid and Brake Fluid Handling .

Is the brake fluid contaminated?

--

Go to Step 18

Go to Step 19

18

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

Is the repair complete?

--

Go to Step 19

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19

Verify proper brake system operation.

Does the original condition still exist?

--

Go to Step 1

System OK