This is how to program your 2001, 2002, and 2003 Pontiac Grand Prix keyless entry remote yourself at home without going to the dealer…

Remove key from ignition switch
Remove the “MALL PGM” fuse from the fuse box
Close all doors
Turn ignition switch to the ‘ACC’ position
Within 1 second, turn the ignition switch to ‘OFF’ and then back to ‘ACC’
Open and close the driver’s door. A chime will sound indicating the programming mode is active.
To program the transmitter, proceed as follows:
Press and hold remote transmitter Lock and Unlock buttons until a chime sounds twice (approximately 14 seconds).
Repeat last step for each additional remote transmitter.
Remove key from ignition switch
Refit “MALL PGM” fuse