Removal Procedure

Place the remote control door lock receiver transmitter face down on a clean surface.
Insert a small screwdriver into the slot on the bottom of the transmitter.
Carefully turn the screwdriver in the slot until the cover releases.

Fig 1: Inserting Screwdriver Into Slot On Bottom Of Transmitter
Courtesy of GENERAL MOTORS CORP.
Remove the cover while being careful not to damage the seal.
Remove the battery from the transmitter.

Fig 2: Removing Battery From Transmitter
Courtesy of GENERAL MOTORS CORP.