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 notice 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 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 procedure:

    •  Brake Rotor Thickness Variation Check in Disc Brakes
    •  Brake Rotor Lateral Runout Check in Disc Brakes
    •  Component Specifications in Drum Brakes

Is the brake rotor or brake drum within specification?

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System OK

Go to Step 5

5

Resurface or replace the brake rotor(s) or brake drum(s). Refer to the appropriate procedure: Brake Rotor Refinishing or Brake Drum Refinishing . Replacing brake rotors or drum brakes. Refer to Front Brake Rotor Replacement , Rear Brake Rotor Replacement in Disc Brakes or Brake Shoe Replacement in Drum Brakes.

Did the repair correct the brake pedal pulsation?

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System OK

Go to Step 1