July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Removal Procedure

Remove the front door trim panel. Refer to Trim Panel Replacement - Side Front Door (Impala) .
Remove the front door water deflector. Refer to Water Deflector Replacement - Front Door (Impala) or Water Deflector Replacement - Front Door (Monte Carlo) .
Remove the front door outer belt sealing strip. Refer to Sealing Strip Replacement - Front Door Window Belt Outer (Impala) or Sealing Strip Replacement - Front Door Window Belt Outer (Monte Carlo) .
Remove the front door window. Refer to Window Replacement - Front Door (Impala) or Window Replacement - Front Door (Monte Carlo) .

Fig 1: Front Door Window Channel Screws (Impala)

GM459239

Courtesy of GENERAL MOTORS CORP.

Remove the screws from the front door window channel.

Fig 2: Removing Front Door Window Channel From Front Door Frame (Impala)

GM459235

Courtesy of GENERAL MOTORS CORP.

Remove the front door window channel from the front door frame.

Fig 3: Front Door Window Channel (Impala)

GM459238

Courtesy of GENERAL MOTORS CORP.

Remove the front door window channel from the front door.

Fig 4: Front Door Rear Window Channel Bolt (Impala)

GM459234

Courtesy of GENERAL MOTORS CORP.

Remove the screw from the front door rear window channel.

Fig 5: Front Door Rear Window Channel (Impala)

GM459229

Courtesy of GENERAL MOTORS CORP.

Remove the front door rear window channel from the front door slot by pulling down to disengage the retainer clip.

Fig 6: Removing Front Door Rear Window Channel (Impala)

GM459233

Courtesy of GENERAL MOTORS CORP.

Remove the front door rear window channel from the front door through the access hole in the inner front door panel.