GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

Notice: Improperly tightened wheel bolts or nuts can lead to brake pulsation and rotor damage. In order to avoid expensive brake repairs, evenly tighten the wheel bolts or nuts to the proper torque specification.

Important: 

   • The brake pedal and/or steering wheel pulsate (shake) when the vehicle is moving and the brakes are applied. This condition is most commonly noticed when the vehicle speed is ABOVE 16 km/h (10 mph).
   • The vehicle lunges when the vehicle is moving and the brakes are applied. This condition is most commonly noticed when the vehicle speed is BELOW 16 km/h (10 mph).

1

Was the Hydraulic Brake Diagnostic System Check performed?

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Go to Step 2

Go to Hydraulic Brake Diagnostic System Check

2

  1. Road test the vehicle where the following diagnostics will permit.
  2. Apply the brakes when the vehicle speed reaches approximately 80 km/h (50 mph).
  3. Observe the steering wheel.

Does the steering wheel shake when the brakes are applied?

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Go to Step 4

Go to Step 3

3

  1. Road test the vehicle where the following diagnostics will permit.
  2. Lightly apply and hold the PARK brake when the vehicle speed reaches approximately 8 km/h (5 mph) until the vehicle stops.

Does the vehicle lurch when the brakes are applied?

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Go to Step 4

System OK

4

Inspect the brake rotors for excessive thickness variation and excessive lateral runout. Refer to the appropriate procedures in Disc Brakes:

Does the rotor thickness variation and/or lateral runout within specifications?

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System OK

Go to Step 5

5

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

Is the repair complete?

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System OK

Go to Step 1