GM Service Manual Online
For 1990-2009 cars only

Tools Required

J 8001 Dial Indicator Set, or equivalent

  1. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  2. Mark the location of the wheels to the hub/axle flanges and mark the specific vehicle position on each tire and wheel (LF, LR, RF, RR).
  3. Remove the tire and wheel assemblies from the vehicle. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.
  4. Remove the brake rotors from the vehicle. Refer to Front Brake Rotor Replacement and Rear Brake Rotor Replacement in Disc Brakes.
  5. Remove any loose debris or corrosion from the hub/axle flange surface.

  6. Object Number: 156131  Size: SH
  7. Position the J 8001 , or equivalent, on the machined surface of the wheel hub/axle flange outside of the wheel bolt holes.
  8. Rotate the hub one complete revolution in order to find the low spot.
  9. Set the J 8001 , or equivalent, to zero at the low spot.
  10. Rotate the hub one more complete revolution and measure the total amount of wheel hub/axle flange lateral runout.
  11. Specification (Guideline)
    Wheel hub/axle flange runout tolerance guideline: 0.05 mm (0.002 in)


    Object Number: 156130  Size: SH
  12. Position the J 8001 , or equivalent, on the circumference surface of the wheel hub/axle flange.
  13. Rotate the hub one complete revolution in order to find the low spot.
  14. Set the J 8001 , or equivalent, to zero at the low spot.
  15. Rotate the hub one more complete revolution and measure the total amount of wheel hub/axle flange radial runout.
  16. Specification (Guideline)
    Wheel hub/axle flange runout tolerance guideline: 0.05 mm (0.002 in)

  17. If the runout of the wheel hub/axle flange IS within specification, proceed to step 17.
  18. If the runout of the wheel hub/axle flange is marginal, the wheel hub may or may not be the source of the disturbance.
  19. If the runout of the wheel hub/axle flange is excessive, replace the wheel hub/axle flange. Measure the runout of the new wheel hub/axle flange. Refer to the appropriate procedure:
  20. •  Front Wheel Hub, Bearing, and Seal Replacement in Front Suspension
    •  Rear Wheel Bearing and Hub Replacement in Rear Suspension
  21. Inspect the threads and the tapered seat portion on each of the wheel bolts for damage.
  22. Wheel bolts exhibiting damaged threads and/or damaged tapered seats require replacement.
  23. Place the threaded portion of each wheel bolt along a straight edge to inspect for straightness.
  24. Wheel bolts that are not straight require replacement.