GM Service Manual Online
For 1990-2009 cars only

    Object Number: 860663  Size: MF
  1. Note the amount and location of the spot welds.
  2. Remove the sealer and drill spot welds from:
  3. 2.1. The panel assembly rear compartment front
    2.2. The rail assembly rear compartment longitudinal
    2.3. The panel assembly rear compartment rear
    2.4. The panel assembly rear compartment side
    2.5. The panel assembly rear end
  4. Clean all of the weld seams with a wire brush, prime, and seal all repair areas.
  5. Apply a permanent underbody sealant.
  6. Important: Ensure that proper corrosion protection processes are used on all repair areas.

  7. Prime with a 2-part catalyzed primer.
  8. Apply sealers and corrosion protection materials according to the information in the Body Paint section of this service manual or the paint manufacturer's recommendations.
  9. Clean the surface for welding and grind the primer off of the new part at the connecting points. Apply 3M® Weld-Thru Coating P/N 05913, or equivalent, to all areas to be welded.
  10. Measure and align the rear compartment rear. Clamp into place.
  11. Use a MIG to plug the weld.