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PRE-RELEASE

Front Compartment Front Half Rail Replacement

Front Compartment Front Half Rail Replacement

Removal Procedure

Refer to Approved Equipment for Collision Repair Warning .

Refer to Glass and Sheet Metal Handling Warning

Note

The service part is developed from a complete assembly and will require the spot weld removal at the rail mid joint. The lower rail service part comes as a complete front rail assembly, including all the brackets and the reinforcements.



1.
Note

Loosen and protect the fuel and brake lines during rail replacement.


Support the engine and the transmission with suitable equipment.


2. Remove the fasteners to the engine and the transmission.

3. Remove all the other related panels and components as necessary, including the suspension and the crossmember.

4. Visually inspect the damaged area. Repair as much of the damage as possible to factory specifications. Refer to Dimensions - Body .

5. Remove the sealers and anti-corrosion materials from the repair area, as necessary.

6. Locate the area where the front compartment will be separated from the rail.


7. Locate and drill the factory welds along the flanges of the rail, only up to and including the rail mid joint just forward of the dash panel.


8. Drill out the factory welds.

9. Pry open the outer layer of the rail at the front rail mid joint to allow the front portion of the rail to be removed from the vehicle.


10. Remove the damaged front lower rail.


11. Drill out the factory welds at the service rail assembly mid joint.


12. Remove the forward portion of the front rail assembly at the mid joint.

13. Prepare the mating surfaces as necessary.


14. Apply GM-approved Weld-Thru Coating or equivalent to all mating surfaces. Refer to Anti-Corrosion Treatment and Repair .


Installation Procedure


1.
Note

If the location of the original plug weld holes can not be determined, space the plug weld holes every 40 mm (11/2 in) apart.


Drill 8 mm (5/16 in) plug weld holes in the service part as necessary in the locations noted from the original panel.


2. Prepare all mating surfaces as necessary.

3. Apply GM-approved Weld-Thru Coating or equivalent to all mating surfaces.

4. Position the rail to the vehicle.


5. Plug weld accordingly.


6. Clean and prepare all welded surfaces.

7. Install all related panels and components.

8. paint the repaired surface. See Basecoat/Clearcoat Paint Systems

9. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .

10. Activate the SIR system. See SIR Disabling and Enabling .


PRE-RELEASE