GM Service Manual Online
For 1990-2009 cars only

Important: Before performing any panel adjustment procedures, refer to Folding Top Clearance Gap Specifications .

Important: Before making adjustments to the up/down position of the folding top panel, determine which panel needs the adjustment and for what reason.

   • When the front top panel is closed and latched, if the panel is too high or too low relative to the windshield header, adjust the position of the panel by adding or removing shims beneath the folding top location pins. Refer to the Front Panel to Windshield Header Adjustment Procedure.
   • When the front top panel is closed and latched, if the panel is too high or too low relative to the rear folding top panel, adjust the position of the front panel by adding or removing shims from the front panel hinge. Refer to Folding Top Front Panel Adjustment .
   • During the closing cycle, if the locating pins are striking the locating pin receivers either too far left or right, or if the front panel is too offset to the windshield header, adjust the cross car position of the locating pin. Refer to the Fore/Aft and Cross Car Adjustment Procedure.

Fore/Aft and Cross Car Adjustment Procedure


    Object Number: 1111822  Size: SH
  1. Manually open the folding top as shown in the illustration. Refer to Folding Top Manual Operation .
  2. The distance (A) from the windshield header to the leading edge of the folding top panel is 400 mm (15.75 in).

  3. Place a protective covering over the interior of the vehicle and the adjacent body panels.
  4. Remove the headliner. Refer to Folding Top Headlining Trim Panel Replacement in Interior Trim.

  5. Object Number: 1246528  Size: SH
  6. Loosen the locating pin bolts (2).
  7. Position the folding top panel so that the panel is resting unlatched on the windshield header, with the locating pins (3) in the receivers (5).
  8. Manually latch the folding top. Apply pressure to the locating pin (3) so that the rubber bumper (4) is contacting the receiver (5).
  9. Apply LOCTITE™ Blue, GM P/N 12345382 (Canadian P/N 10953489) or equivalent to the bolts.
  10. Notice: Refer to Fastener Notice in the Preface section.

  11. Tighten the locating pin bolts (1).
  12. Tighten
    Tighten the bolts to 8 N·m (71 lb in).

  13. Manually open the folding top. Refer to Folding Top Manual Operation .
  14. Manually close the folding top while inspecting the alignment of the locating pin to the receiver. Manually close and latch the folding top.
  15. Verify that the folding top panel is aligned properly. Refer to Folding Top Clearance Gap Specifications .
  16. Repeat the adjustment procedure as necessary.
  17. Remove the protective covering.
  18. Cycle the folding top under power through one complete cycle in both directions.
  19. Inspect the folding top for proper operation. Refer to Power Folding Top Description and Operation .
  20. Install the headliner. Refer to Folding Top Headlining Trim Panel Replacement in Interior Trim.

Front Panel to Windshield Header Adjustment Procedure


    Object Number: 1111822  Size: SH
  1. Manually open the folding top as shown in the illustration. Refer to Folding Top Manual Operation .
  2. The distance (A) from the windshield header to the leading edge of the folding top panel is 400 mm (15.75 in).

  3. Place a protective covering over the interior of the vehicle and the adjacent body panels.
  4. Remove the headliner. Refer to Folding Top Headlining Trim Panel Replacement in Interior Trim.

  5. Object Number: 1246528  Size: SH
  6. Loosen the locating pin bolts (2).
  7. Position the folding top panel so that the panel is resting unlatched on the windshield header, with the locating pins in the receivers.
  8. Add or remove shims (1) to obtain the necessary alignment.

  9. Object Number: 1246528  Size: SH
  10. Manually latch the folding top. Apply pressure to the locating pin (3) so that the rubber bumper (4) is contacting the receiver (5).
  11. Apply LOCTITE™ Blue, GM P/N 12345382 (Canadian P/N 10953489) or equivalent to the bolts.
  12. Notice: Refer to Fastener Notice in the Preface section.

  13. Tighten the locating pin bolts
  14. Tighten
    Tighten the bolts to 8 N·m (71 lb in).

  15. Manually open the folding top. Refer to Folding Top Manual Operation .
  16. Manually close the folding top while inspecting the alignment of the locating pin to the receiver. Manually close and latch the folding top.
  17. Verify that the folding top panel is properly aligned. Refer to Folding Top Clearance Gap Specifications .
  18. Repeat the adjustment procedure as necessary.
  19. Remove the protective covering.
  20. Cycle the folding top under power through one complete cycle in both directions.
  21. Inspect the folding top for proper operation. Refer to Power Folding Top Description and Operation .
  22. Install the headliner. Refer to Folding Top Headlining Trim Panel Replacement in Interior Trim.