GM Service Manual Online
For 1990-2009 cars only
  1. Inspect all suspension components and wheels carefully for the following damage:
  2. • Check for cracks in component attachment areas
    • Check for corrosion
    • Check for large chips in casting surfaces
    • Check for large gauges in casting surfaces
  3. Inspect the suspension components for wear.
  4. Inspect the wheels for wear.
  5. Inspect suspension components for galvanic corrosion.
  6. Inspect fasteners for galvanic corrosion.
  7. Galvanic corrosion develops due to the use of the following dissimilar metals:
  8. • Forged
    • Cast aluminum
    • Steel
  9. Use specially coated original factory fasteners to prevent corrosion.
  10. Replace suspension components with new parts if the following is present:
  11. • Bent suspension components
    • Damaged suspension components
    • Worn suspension components
  12. If bent, damaged and/or worn suspension components or bent, damaged and/or worn wheels are present, carefully inspect the ball joint stud attachment to the knuckle boss for looseness or damage. Refer to Ball Stud And Knuckle Inspection in this section.
  13. Do not heat, quench, straighten or weld aluminum suspension components.