For 1990-2009 cars only
Removal Procedure
- Disable to SIR system.
- Disconnect the negative battery cable
- Remove all related panels and components.
- Repair as much of the damage as possible to factory specifications.
- Note the locations and remove the sealers and anti-corrosion materials from the repair area, as necessary. Refer to Anti-Corrosion Treatment and Repair.
- Locate and drill out all factory welds in the front wheelhouse extension (1). Note the number and location for installation.
- Remove the damaged front wheelhouse extension (1).
Important: Do not damage any inner panels or reinforcement.
Installation Procedure
- Drill 8 mm (5/16 in) plug weld holes in the service part as necessary in the locations noted from the original assembly.
- Prepare the mating surfaces as necessary.
- Apply GM approved Weld-thru Coating or equivalent to all mating surfaces. Refer to Anti-Corrosion Treatment and Repair.
- Position the front wheelhouse extension (1) to the vehicle using 3-dimensional measuring equipment. Clamp the wheelhouse extension in place.
- Plug weld the front wheelhouse extension (1) accordingly.
- Clean and prepare all the welded surfaces.
- Apply the sealers and anti-corrosion materials to the repair area as necessary. Refer to Anti-Corrosion Treatment and Repair.
- Paint the repair area. Refer to Basecoat/Clearcoat Paint Systems.
- Install all related panels and components.
- Connect the negative battery cable.
- Enable the SIR system.
Important: If the location of the original plug weld holes can not be determined, space the plug weld holes every 40 mm (1 in) apart. Some panels may have structural weld-thru adhesive. It is necessary to replace the weld-thru adhesive with an additional spot weld between each factory spot weld.
