GM Service Manual Online
For 1990-2009 cars only

Front Rail Replacement Corvette

Special Tools

J 42058 Frame Adapter Clamp

Removal Procedure

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

  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 related panels and components.
  4. Remove the front impact bar. Refer to Front Bumper Impact Bar Replacement.
  5. Note the location and remove the sealers and anti-corrosion materials from the repair area. Refer to Anti-Corrosion Treatment and Repair.
  6. Repair as much of the damage as possible to the factory specifications.
  7. Use J 42058 to secure the vehicle if pulling and straightening are required.
  8. Inspect the front of the dash panel, floor panels, and all other sheet molded compound (SMC) for cracks or areas that may need to be repaired or resealed.

  9. Object Number: 860985  Size: SH
  10. Remove the damaged section of frame rail within the shaded area.

Installation Procedure

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


    Object Number: 943356  Size: SH
  1. Determine the sectioning joint location within the recommended area.

  2. Object Number: 870423  Size: SH
  3. Cut the new frame section from the new frame rail assembly.
  4. Perform the sleeved butt-joint sectioning. Refer to Sleeved Butt Joint Repair.
  5. Install the front impact bar. Refer to Front Bumper Impact Bar Replacement.
  6. Apply the sealers and anti-corrosion materials to the repair area. Refer to Anti-Corrosion Treatment and Repair.
  7. Paint the repair area. Refer to Basecoat/Clearcoat Paint Systems.
  8. Install all related panels and components.
  9. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection.
  10. Enable SIR system. Refer to SIR Disabling and Enabling.

Front Rail Replacement Z06, ZR1

Special Tools

J 42058 Frame Adapter Clamp

Removal Procedure

The service rails are complete rail assemblies for the left and the right sides, 6063-T7, hydro-formed aluminum parts.

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

  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 related panels and components.
  4. Remove the front impact bar. Refer to Front Bumper Impact Bar Replacement.
  5. Note the location and remove the sealers and anti-corrosion materials from the repair area. Refer to Anti-Corrosion Treatment and Repair.
  6. Repair as much of the damage as possible to the factory specifications.
  7. Use J 42058 to secure the vehicle if pulling and straightening are required.
  8. Inspect the front of the dash panel, floor panels, and all other sheet molded compound (SMC) and carbon fiber for cracks or areas that may need to be repaired or resealed.

  9. Object Number: 1655993  Size: SH
  10. Remove the damaged section of frame rail.

Installation Procedure

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


    Object Number: 1655985  Size: SH
  1. Determine the sectioning joint location within the recommended area.

  2. Object Number: 1654842  Size: SH
  3. Cut the new frame section from the new frame rail assembly.

  4. Object Number: 857910  Size: SH
  5. Perform the sleeved butt-joint sectioning. Refer to Sleeved Butt Joint Repair.
  6. Install the front impact bar. Refer to Front Bumper Impact Bar Replacement.
  7. Apply the sealers and anti-corrosion materials to the repair area. Refer to Anti-Corrosion Treatment and Repair.
  8. Paint the repair area. Refer to Basecoat/Clearcoat Paint Systems.
  9. Install all related panels and components.
  10. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection.
  11. Enable SIR system. Refer to SIR Disabling and Enabling.