Caution: Refer to Approved Equipment for Collision Repair Caution in the Preface section.

Caution: Refer to Collision Sectioning Caution in the Preface section.

Important: Perform all of the steps on both of the rails for complete module replacement.

1. Disable the SIR system. Refer to SIR Disabling and Enabling .
2. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .



3. Remove all of the related panels and the components.
4. Visually inspect all of the damage forward of the rear module. Use 3-dimensional measuring in order to restore the damage to the factory specifications.
5. Separate the center and the rear module at the factory stitch weld (1) with a die grinder or an appropriate tool.
6. Pry the lower edge of cross tube bracket down (2) in order to allow the rear module to separate from the center module.
7. Remove the damaged rear module.

Important: Monitor the specified dimensions by frequently performing 3-dimensional measuring throughout the procedures.

1. Prepare all mating surfaces as necessary.
2. Apply 3M Weld-Thru Coating P/N 05916 or equivalent to all mating surfaces.
3. Install and position the replacement module using 3-dimensional measuring.
4. Restore the bracket flange (2) for a flush fit to the new service part.
5. Tack weld the rear module into position. Inspect the service part for the proper dimensions.
6. Stitch weld the entire sectioning joint.

Important: Prior to refinishing, refer to GM 4901MD-99 Refinish Manual for recommended products. Do not combine paint systems. Refer to paint manufacturer's recommendations.

7. Clean and prepare the welded surfaces.
8. Apply approved anti-corrosion primer.
9. Apply the sealers.
10. Refinish the welded surfaces as necessary.
11. Install all of the related panels and the components.
12. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .
13. Enable the SIR system. Refer to SIR Disabling and Enabling .