GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

Caution: Foam sound deadeners must be removed from areas within 152.4 mm (6 in) of where flame is to be used for body repairs. When reinstalling foam sound deadeners, avoid inhaling fumes as bodily injury may result.


Object Number: 690554  Size: SH

Important: Both the driver-side and passenger-side front wheelhouses are available as complete assemblies with the strut tower attached to the wheelhouse. The strut mounting holes are pre-punched in the service part, which also includes all necessary component stud mounts. When replacing a wheelhouse, carefully position the service assembly. Use three-dimensional measuring equipment to properly locate the wheelhouse.

Important: Do not replace the entire wheelhouse when damage is limited to the front portion of the wheelhouse assemblies. Replace only the necessary service parts.


    Object Number: 690557  Size: SH
  1. Remove all related panels and components.
  2. Visually inspect and restore as much of the damage as possible to factory specifications.
  3. Remove all sealers and anti-corrosion materials as necessary.
  4. Place a piece of 25 mm (1 in) wide masking tape (1) on the forward contour of the wheelhouse at the flange where it attaches to the cowl panel.

  5. Object Number: 690560  Size: SH
  6. Cut the wheelhouse along the forward edge of the masking tape to leave a 25 mm (1 in) tab extending forward from the cowl panel (1).
  7. Locate, mark and drill out factory welds which attach the wheelhouse assembly to the following areas (2):
  8. • The upper rail inner panel
    • The cowl panel
    • The radiator support
    • The lower front rails
  9. Remove the damaged wheelhouse assembly.

Installation Procedure

  1. Clean and prepare surfaces to be welded.

  2. Object Number: 690560  Size: SH
  3. Cut the flange off the service part that is normally welded to the cowl panel (1).
  4. Drill 8 mm (5/16 in) holes for plug welding in the locations noted from the original assembly.
  5. Drill holes for plug welding every 40 mm (1½ in) along the cut edge to be attached to the tab remaining from the original assembly (2).
  6. Inspect the position of the wheelhouse assembly, use 3-dimensional measuring equipment.
  7. Plug weld accordingly.
  8. Clean and prepare all welded surfaces.
  9. Prime with 2-part catalyzed primer.
  10. Apply the following as necessary:
  11. • Sealers
    • Sound deadeners
    • Anti-corrosion materials
  12. Install all related panels and components.