Causes of Slow Moving Glass

WARNING: This page is about a different car, the 2002 Buick Regal and 2002 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION: Disconnect the power window switch when working inside the driver door. When operated, the Express Up/Down Feature allows the door window to move very quickly, without stopping, which could cause personal injury.

Owners may comment that the windows (door glass) operates slowly when going up or down.
Listed below are 4 conditions that may cause slow moving glass.
- The glass run channel outboard lip at the rearview mirror is rolled over or the glass run channel outboard lip at the door rear, is rolled over (2).
- The glass run channel is not seated at the door rear.
- The glass is misaligned in the opening.
- The regulator is misaligned causing misalignment of the glass.
  
  Fig 1: Identifying Glass Run Channel Outboard Lip
  Courtesy of GENERAL MOTORS CORP.