GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

  1. Remove the trim panel. Refer to Door Trim Panel Replacement or to Front Side Door Trim Panel Replacement .
  2. Remove the water deflector. Refer to Door Water Deflector Replacement .
  3. Important: Do not adjust the door after the glass adjustment.

  4. Adjust the door, as necessary. Refer to Door Hinge Replacement

Glass Height (Rotational) Adjustment


    Object Number: 284154  Size: MH
  1. Mark the up stop positions (2) at the full up position.
  2. Lower the glass from the full up position in order to relieve pressure on the up stops.
  3. Adjust the glass height adjusters (2), as necessary.

  4. Object Number: 284155  Size: MH
  5. Inspect the glass height adjustment by completing the following steps:
  6. 4.1. Apply masking tape over the top edge of the glass.
    4.2. With the glass at the full up position, make a pen mark on the tape along the molding (2).
    4.3. Verify that the glass engagement is a minimum of 5.0 mm (0.20 in).
    4.4. Verify that the swing clearance of the door glass is a minimum of 2.0 mm (0.08 in).
    4.5. Verify that adequate power is available to the window motor so that system is in maximum compression.
  7. Lower the glass.
  8. Raise the glass.
  9. Verify the measurements.
  10. Repeat steps 1-3, as necessary.
  11. Close the door with the window in the full up position.
  12. Observe whether the glass rubs or is very close to rubbing the roof rail molding.

Window Tilt Adjustment (Outboard/Inboard)


    Object Number: 284154  Size: MH
  1. Mark all of the adjustments.
  2. Loosen the stabilizer bracket assembly fore/aft and glass tilt adjustments (4).
  3. Loosen the secondary glass tilt adjustment (6).
  4. Adjust the primary glass tilt adjustment (3) in or out as necessary in order to move the top of the glass.
  5. Tighten the primary glass tilt adjustment nut.
  6. Operate the window module in order to verify that the adjustments do not restrain movement.
  7. Place the window in the full down position in order to ensure that the front guide channel allows free movement.
  8. Tighten the secondary glass tilt adjuster (6).
  9. Sit inside the vehicle in order to observe the back channel guide.
  10. Close the door.

  11. Object Number: 284155  Size: MH
  12. Operating the window, observe that glass moving upward does not damage the rear seal (4).
  13. If the glass may damage the seal (4), return to Step 1.
  14. • Damage to the seal indicates that the glass tilts too far inboard.
    • If the glass does not tilt inboard enough for a proper position at the full up position, move the seal retainer outboard.
    • If the glass does not tilt outboard enough for a proper position at the full up position, move the seal retainer inboard.
  15. Tighten all of the adjustments.

Glass Fore/Aft Adjustment


    Object Number: 284154  Size: MH
  1. Mark the following adjustments:
  2. • The top fore/aft adjustments (1)
    • The bottom fore/aft adjustments (5)
  3. Loosen the following components:
  4. • The top fore/aft adjustments (1)
    • The bottom fore/aft adjustments (5)
    • The stabilizer bracket fore/aft adjustment (4) nut
  5. Holding the glass, push the glass forward or rearward as necessary in order to move the guidance system as a single assembly.
  6. Tighten the top fore/aft adjustments (1).
  7. Close the door.
  8. Inspect the adjustments for movement.

  9. Object Number: 284155  Size: MH

    Important: 

       • When moving the glass forward, ensure that the door glass does not fold the seal lip (1) under the glass. This condition indicates that the glass is too far forward.
       • When moving the glass rearward, ensure that the door glass top corner (3) does not come close to the rear pillar or the B pillar.
       • If the glass rubs the windshield pillar molding, the glass adjustment is too far forward.

  10. Tighten all of the adjustments.
  11. Important: Do not slam the door. Air resistance may cause the glass to stand up slightly. This condition may result in a reduced clearance condition between the glass and the roof rail molding.

  12. Close the door.
  13. Inspect the window for contact between the glass and the roof rail molding.

Installation Procedure


    Object Number: 284149  Size: SH
  1. Install the water deflector. Refer to Door Water Deflector Replacement .
  2. Install the trim panel. Refer to Door Trim Panel Replacement or to Front Side Door Trim Panel Replacement .