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Home >> Chevrolet >> 2021 >> Suburban Commercial, RWD >> Repair and Diagnosis >> Collision >> Body Panels >> Body Panel Replacement >> Body Panel Replacement >> Roof Front Header Panel Replacement >> Installation Procedure
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Installation Procedure

    NOTE:

    Prepare front header before installation.

  1. Prepare front header per installation requirements.
  2. Prepare all joining surfaces for welding as necessary.
  3. Apply weld-thru coating or equivalent to all welding surfaces. Anti-Corrosion Treatment and Repair
    GM5387224Courtesy of GENERAL MOTORS COMPANY
  4. Position front header (1) to vehicle using 3-dimensional measuring equipment.
    GM5387229Courtesy of GENERAL MOTORS COMPANY
    5. NOTE:

    Left shown, right similar.

  5. Install spot welds. [17x]
    GM5387228Courtesy of GENERAL MOTORS COMPANY
    6. NOTE:

    Left shown, right similar.

    NOTE:

    Perform MIG/MAG weld on both sides of new front header.

  6. Install MIG/MAG weld. [1x]
  7. Install roof outer panel. Roof Outer Panel Replacement (SWB) Roof Outer Panel Replacement (LWB Sunroof) Roof Outer Panel Replacement (LWB) Roof Outer Panel Replacement (SWB Sunroof) 
  8. Apply the sealers and anti-corrosion materials to the repair area as necessary. Anti-Corrosion Treatment and Repair
    9. NOTE:

    Before refinishing, refer to Anti-Corrosion Treatment and Repair

  9. Paint the repaired area. Basecoat/Clearcoat Paint Systems .
  10. Install all related panels and components.
  11. Connect the battery negative cable. Battery Negative Cable Disconnection and Connection (9C1, 5W4)Battery Negative Cable Disconnection and Connection (KL9)
  12. Enable the SIR System. SIR Disabling and Enabling .
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