GM Service Manual Online
For 1990-2009 cars only
8-Digit GM Part Number: The scan tool displays an 8 digit number which indicates the GM part number of the module.

# of Fobs Programmed: The scan tool displays 1 Fob -- 4 Fobs to indicate the number of keyless entry transmitters that are programmed for the system.

Key Pressed on Fob: The scan tool displays Dr. Door Unlock, Door Lock, All Door Unlock, Trunk, or Fuel Door/Alarm which indicates which keyless entry transmitter button was last pressed.

Last Fob Used: The scan tool displays Fob#1-Fob#4 which indicates the number of the last keyless entry transmitter used.

PROM ID: The scan tool displays a 4 digit number which indicates the ID number of the PROM associated with the module.