GM Service Manual Online
For 1990-2009 cars only

Step

Action

Values

Yes

No

1

Did you review the system descriptions and perform the necessary inspections?

--

Go to Step 2

Go to Symptoms - Suspension General Diagnosis

2

Road test the vehicle in order to verify the customer's concern.

Does the vehicle operate normally?

--

System OK

Go to Step 3

3

  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  2. Inspect for tire or wheel damage. Refer to Tire and Wheel Assembly Runout Measurement - On-Vehicle in Vibration Diagnosis and Correction.

Did you find and correct the condition?

--

Go to Step 7

Go to Step 4

4

  1. Install the J 39570 Chassis Ear or equivalent.
  2. Road test the vehicle to verify the location of the wheel bearing noise.

Did you locate the source of the wheel bearing noise?

--

Go to Step 6

Go to Step 5

5

  1. Install the pointer of the J 8001 Dial Indicator, or equivalent, to the outer edge of the brake rotor on the suspect bearing assembly. Refer to Brake Rotor Assembled Lateral Runout Measurement in Disc Brakes for the rotor preparation procedure and the dial indicator installation procedure.
  2. Ensure that the dial indicator is perpendicular to the rotor and as close as possible to the top edge of the braking surface.
  3. Use a spring balance in order to apply 10 kg (22 lb) of force outward to the bottom of the rotor. While pulling the bottom of the rotor, zero the dial indicator.
  4. Apply 10 kg (22 lb) of force inward to the bottom of the rotor. Measure the angular movement of the rotor.

Is the measurement greater then the specified value?

0.213 mm (0.008 in)

Go to Step 6

System OK

6

Replace the wheel bearing. Refer to Front Wheel Bearing and Hub Replacement in Front Suspension or Rear Wheel Bearing and Hub Replacement in Rear Suspension.

Did you complete the repair?

--

Go to Step 7

--

7

Road test the vehicle to verify the repair.

Does the vehicle operate normally?

--

System OK

Go to Step 3