For 1990-2009 cars

### Removal Procedure

The floor pan assembly comes complete including the lower rails, crossbar, rear floor extension and various other components.

Important: One side inner and outer wheelhouses must be removed when replacing the entire sub-assembly.

1. Remove all related panel and components.
2. Visually inspect and restore as much of the damage as possible.
3. Remove the following as necessary:

• | Sealers

• | Sound deadeners

• | Anti-corrosion materials

4. Remove 4 inner reinforcements (2-dynamic side impact braces-front; 2-floor pan braces-rear) to access the spot welds.

### Installation Procedure

1. Prepare the mating surfaces with a suitable weld-through primer.

Important: In any area damaged beyond recognition, space plug weld holes every 40 mm (1 1/2 in) apart.

2. Drill 8 mm (5/16 in) plug weld holes along all mating surfaces except where the floor mates to each wheelhouse.
3. Position the service floorpan and check for proper fit. Use three-dimensional measuring equipment.
4. Clean and prepare all welded surfaces.

Important: Prior to refinishing, refer to GM 4901M--2000 "GM Approved Refinish Materials for recommended products. Do not combine paint systems. Refer to paint manufacturer's recommendations.

5. Apply an approved anti-corrosion primer to all bare metal surfaces.
6. Apply body sealers and finish as necessary.
7. Install all related components previously removed for access.