GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 2009 🢒 G8 🢒 Suspension 🢒 Tires and Wheels 🢒 Wheel Mounting Surface Check

    Warning: Refer to Safety Glasses Warning in the Preface section.

    Danger: To avoid any vehicle damage, serious personal injury or death when major components are removed from the vehicle and the vehicle is supported by a hoist, support the vehicle with jack stands at the opposite end from which the components are being removed and strap the vehicle to the hoist.

  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle.
  2. Remove the wheels. Refer to Tire and Wheel Removal and Installation.
  3. Inspect the wheel stud holes for damage. If damage is found the wheel must be replaced. Refer to Replacement Wheels Description.
  4. Thoroughly clean the wheel mounting surface.

    5. Object Number: 1997037 Size: SH

    Note: Use a straight edge (1) 150 to 165 mm (6 to 6.5 in) long.

    Note: If you can rock the straight edge (1) the mounting surface (2) is bent and the wheel must be replaced.

    Note: For steel wheels the outer mounting ring (4) is designed to be raised slightly above the inner mounting ring (3).

  5. Place a straight edge (1) across the wheel inboard mounting surface (2) over a wheel stud hole. Attempt to rock the straight edge up and down on the mounting surface.
  6. Repeat Step 5 over every wheel stud hole.
  7. Replace wheels as required. Refer to Replacement Wheels Description and Tire Dismounting and Mounting.
  8. Remove the safety stands.
  9. Lower the vehicle to the ground.