For 1990-2009 cars only
Removal Procedure
- Disable the SIR system. Refer to SIR Disabling and Enabling in SIR.
- Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
- Remove all related panels and components.
- Repair as much of the damage as possible to factory specifications. Refer to Dimensions - Body .
- Note the location and remove the sealers and anti-corrosion materials from the repair area, as necessary. Refer to Anti-Corrosion Treatment and Repair in Paint/Coatings.
- Remove the outer and inner rear end panels. Refer to Rear End Panel Replacement .
- Locate and mark all factory welds attaching the rear compartment floor panel to the rear floor panel and the rear side lower rails.
- Note the number and location of welds for installation of the rear compartment floor assembly.
- Structural adhesive is applied to the area shown (1) between the rear side rail lower assemblies and the rear floor panel.
- Locate and mark all factory welds attaching the rear compartment floor panel outer extensions from the rear wheelhouse panel, rear quarter panel, and the rear end panel assemblies.
- Note the number and location of welds for installation of the rear compartment floor assembly.
- Drill out all factory welds.
- Do not damage the following components:
- Remove the damaged floor section.
Caution: Refer to Approved Equipment for Collision Repair Caution in the Preface section.
Important: Before beginning the repair, refer to Metal Panel Bonding for proper adhesive applicator preparations and general information.
Caution: Refer to Foam Sound Deadeners Caution in the Preface section.
Important: As this structural adhesive material is extremely hard, this area may require cutting.
| • | The rear rails |
| • | The quarter panel |
| • | The wheelhouse |
Installation Procedure
- Prepare the mating surfaces as necessary.
- Inspect for proper fit.
- Drill 8-mm (5/16-in) plug weld holes as necessary in the locations noted from the original floor assembly.
- Position the service assembly and inspect for proper fit.
- Apply 3M Weld-Thru Coating P/N 05916, or equivalent, to all mating surfaces.
- Apply a 3-6 mm (1/8-1/4 in) bead of metal panel bonding adhesive (1) GM P/N 12378566/7 (Canadian P/N 88901674/5), or equivalent, between the rear side lower rail and the rear compartment floor panel.
- Install the rear compartment floor panel assembly, ensuring it is seated under the left-hand rear floor panel reinforcement.
- Plug weld accordingly.
- Install the quarter panel. Refer to Quarter Panel Replacement .
- Install the inner and outer rear end panels. Refer to Rear End Panel Replacement .
- Clean and prepare all welded surfaces.
- Apply the sealers and anti-corrosion materials to the repair area, as necessary. Refer to Anti-Corrosion Treatment and Repair in Paint/Coatings.
- Paint the repair area. Refer to Basecoat/Clearcoat Paint Systems in Paint/Coatings.
- Install all related panels and components.
- Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
- Enable the SIR system. Refer to SIR Disabling and Enabling in SIR.
Important: The adhesive has a 40-50 minute working time. Do not allow the rear compartment floor panel to totally cure off the vehicle, as proper alignment of the rear compartment floor panel to the rear floor will be difficult.
