GM Service Manual Online
For 1990-2009 cars only

Adjustment Procedure

  1. Remove the trim panel. Refer to Door Trim Panel Replacement .
  2. Remove the speaker assembly. Refer to Radio Front Side Door Lower Speaker Replacement in Entertainment.
  3. Remove the water deflector. Refer to Door Water Deflector Replacement .

Parallelism Adjustment Procedure


    Object Number: 319973  Size: MH
  1. Inspect the window parallelism adjustment. Perform the following steps:
  2. 1.1. Raise the window approximately 13 mm (0.5 in) below the full up position.
    1.2. Inspect for parallelism on the upward motion of the window.
    1.3. Ensure that the gap from the horizontal edge (1) of the window to the weatherstrip is even at the following locations:
       • The front of the window
       • The rear of the window

    Object Number: 443068  Size: SH
  3. Perform the following steps to the inner cam bolts (2) in order to adjust the parallelism:
  4. 2.1. Loosen the bolts (1) on the door module (2).
    2.2. Reposition the bolts (1).

    Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  5. Tighten the inner cam bolts.
  6. Tighten
    Tighten the inner panel cam bolts to 11 N·m (97 lb in).

Window Fore and Aft Adjustment Procedure

  1. Place the window in the up position.
  2. Close the door.
  3. Measure the space between the window and the B-pillar weatherstrip retainer.
  4. Important: Moving the window too far will cause the following conditions to occur:

       • Increase the door closing effort.
       • Reduce the window seal contact at the B-pillar.
       • If the space is not within specification, perform the following procedures:

  5. Ensure that the space is 6-7 mm (0.25 in).
  6. 4.1. Loosen the regulator to window sash channel (1) bolts.
    4.2. Reposition the window.
    4.3. Inspect the adjustment.

    Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  7. Finger tighten the sash channel bolts.
  8. Tighten
    Tighten the regulator to sash channel bolts to 11 N·m (97 lb in).

Window Upstop Adjustment


Object Number: 319984  Size: SH

Important: The window upstop adjusters (3) are color coded in the following manner:

   • The front upstop adjuster is a neutral color.
   • The rear adjuster is black.
The adjuster has a 6 mm (0.23 in) head. One full turn equals 1 mm (0.04 in) of movement of the glass.

While facing the door inner panel, the following conditions may be observed:

   • A clockwise rotation moves the window up.
   • A counterclockwise rotation moves the window down.
Lower the window slightly in order to relieve pressure before moving the adjusters.


    Object Number: 319988  Size: MH
  1. Remove the roof rail weatherstrip.
  2. Insert a 2.6 cm (1 in) wide roll of masking tape (2) in the weatherstrip retainer assembly (3).
  3. Place the window in the full up position.
  4. Close the door.
  5. Measure the gap between the edge of the weatherstrip retainer assembly (3) and the top edge of the window.
  6. Ensure that the gap is 3 mm (0.125 in).

  7. If the gap is not within specifications, perform the following steps:
  8. 6.1. Determine the necessary amount of movement for the assembly.
    6.2. Adjust the upstops, as needed.
  9. Reinstall the roof rail weatherstrip.
  10. Install the water deflector. Refer to Door Water Deflector Replacement .
  11. Install the speaker assembly. Refer to Radio Front Side Door Lower Speaker Replacement in Entertainment.
  12. Install the door trim panel. Refer to Door Trim Panel Replacement .