Removal Procedure

Remove the window panel garnish molding (1).
Refer to GARNISH MOLDING REPLACEMENT -- SUNROOF PANEL WINDOW (ZRX/EXTREME W/ CF5) in Interior Trim.

Fig 1: Window Panel Garnish Molding (ZRX/EXTREME w/CF5)
Courtesy of GENERAL MOTORS CORP.
Remove the 2 front screws (2) that retain the sunroof window to the sunroof slider arm.

Fig 2: Removing Front Screws That Retain Sunroof Window To Sunroof Slider Arm
Courtesy of GENERAL MOTORS CORP.
Remove the 2 rear screws (2) that retain the sunroof window (1) to the sunroof slider arm.

Fig 3: Removing Rear Screws That Retain Sunroof Window To Sunroof Slider Arm
Courtesy of GENERAL MOTORS CORP.
With the palm of the hand, remove the sunroof window from the top of the slider arms.

Fig 4: Removing Sunroof Window From Top Of Slider Arms
Courtesy of GENERAL MOTORS CORP.