GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2001 🢒 Yukon Denali 🢒 Body and Accessories 🢒 Collision Repair 🢒 Front Hinge Pillar Sectioning

Removal Procedure

    Object Number: 383357 Size: SH
  1. Remove all related panels and components.
  2. Restore as much of the damage as possible to factory specifications.
  3. Note the location and remove the following as necessary:
    4. • The sealers
    • The sound deadeners
    • The anti-corrosion materials
  4. Measure 80 mm (3 1/8 in) down (1) from the large wiring harness hole in the hinge pillar and mark a horizontal line.
  5. Perform additional sectioning procedures as necessary. Refer to Center Pillar Replacement Rear Pillar Sectioning Outer Door Frame Sectioning - Windshield Pillar Rocker Panel Replacement

    6. Important: Do not damage the inner panels or reinforcements.

  6. Cut the pillar in the locations where sectioning is to be performed.
  7. Locate and drill out all factory welds. Note the number and location of the welds for installation of the service part.
  8. Remove the damaged section of the door frame opening.

    9. Object Number: 383364 Size: SH
  9. Cut and remove 30 mm (1 3/16 in) from the flanges on either side of the remaining section of the original hinge pillar to create 30 mm (1 3/16 in) tabs. Cut 5 mm (3/16 in) wide gaps in the bottom corners.

    10. Object Number: 671573 Size: SH

    Important: The metal of the hinge pillar is of a heavy gauge. However, the tabs can be created using the appropriate tools.

  10. Step the tabs (1) inward to allow the door frame opening service section to fit over the original hinge pillar. Weld the tabs together along the edges.

Installation Procedure

    Object Number: 383376 Size: SH
  1. On the service part, measure 50 mm (2 in) down  (1) from the large wiring harness hole in the hinge pillar and mark horizontal line. Cut the hinge pillar along this line.
  2. Perform additional sectioning procedures as necessary to remove the unused areas of the service part. Refer to Center Pillar Replacement Rear Pillar Sectioning Outer Door Frame Sectioning - Windshield Pillar Front Hinge Pillar Sectioning Rocker Panel Replacement
  3. Drill 8 mm (5/16 in) plug weld holes along the hinge pillar sectioning cut on the service part. Locate these holes approximately 15 mm (9/16 in) from the edge and spaced 40 mm (1 ½ in) apart.

    4. Object Number: 383381 Size: SH

    Important: In any area damaged beyond recognition, space plug weld holes every 40 mm (1 ½ in) apart (1).

  4. Drill 8 mm (5/16 in) plug weld holes (1) in the service part (2) , in the locations noted from the original panel.

    5. Caution: Foam sound deadeners must be removed from areas within 152.4 mm (6 in) of where flame is to be used for body repairs. When reinstalling foam sound deadeners, avoid inhaling fumes as bodily injury may result.

  5. Prepare all attachment surfaces as necessary.
  6. Apply weld-through primer to all bare-metal surfaces.
  7. Align the service section over the stepped tab on the original hinge pillar, allowing 30 mm (1 3/16 in) of overlap. Check fit using 3-dimensional measuring.

    8. Object Number: 383389 Size: SH
  8. Plug weld service part in position (1).
  9. To create a solid weld with minimum heat distortion, make 25 mm (1 in) welds along the seam with 25 mm (1 in) gaps between them (2). Then, go back and complete the stitch weld.

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

  10. Clean and prepare all welded surfaces.
  11. Apply the following as necessary:
    12. •  An approved anti-corrosion primer
    • The sound deadening materials
    •  The sealers and the refinish materials
  12. Install all related panels and components.