Chevrolet Silverado / GMC Sierra. Service manual — part 1479

Pull or push the tire at the top back and forth in order to test the wheel bearing play.

Use a pry bar under the tire as an alternative.

If the wheel bearing adjustment is correct, the movement will be barely noticeable.

If the movement is excessive, adjust the bearings.

Adjustment Procedure

Tools Required

J 2222-C Wheel Bearing Nut Wrench. See Special Tools.

Adjustment

1. Raise the vehicle. Refer to Lifting and Jacking the Vehicle .

2. Remove the axle shaft. Refer to Rear Axle Shaft and/or Gasket Replacement.

2008 Chevrolet Silverado 1500

2008 Driveline/Axle Rear Drive Axle - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado

Fig. 258: Axle Nut Retaining Ring
Courtesy of GENERAL MOTORS CORP.

3. Remove the hub adjuster nut retaining ring.

Fig. 259: Adjuster Nut Lock Key
Courtesy of GENERAL MOTORS CORP.

4. Remove the adjuster nut lock key.

2008 Chevrolet Silverado 1500

2008 Driveline/Axle Rear Drive Axle - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado

Fig. 260: Adjusting Nut & J 2222-C
Courtesy of GENERAL MOTORS CORP.

5. Tighten the wheel bearing adjusting nut using the J 2222-C . See Special Tools.

Rotate the hub in the opposite direction to the way the adjuster nut is turning.

Ensure the inner bearing and the seal seats against the spindle shoulder.

Tighten: Tighten the adjusting nut to 70 N.m (52 lb ft).

6. Turn the adjusting nut counterclockwise until the nut is loose using the J 2222-C . See

NOTE:

Refer to Fastener Notice .

2008 Chevrolet Silverado 1500

2008 Driveline/Axle Rear Drive Axle - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado

Special Tools.

7. Turn the adjusting nut clockwise until the nut contacts the bearing cone. Torque on the nut

must be zero to finger tight.

Fig. 261: Adjuster Nut Lock Key
Courtesy of GENERAL MOTORS CORP.

8. Insert the adjusting nut lock key into the keyway using one of the following procedures:

If the adjusting nut slot is in alignment with the keyway in the axle spindle, insert the
adjusting nut lock key into the keyway in the axle spindle.

IMPORTANT: Do not turn the adjusting nut more than one slot

counterclockwise in order to align the adjusting nut slot
with the keyway in the axle spindle.

2008 Chevrolet Silverado 1500

2008 Driveline/Axle Rear Drive Axle - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado