GM Service Manual Online
For 1990-2009 cars only

Prom ID - Scan tool displays 00,000,001 - 99,999,999

This information is used to identify the software version or calibration set being used by the Remote Control Door Lock Receiver (RCDLR) module.

Last FOB Used - Scan tool displays None / Fob #1 / Fob #2

This input is used by the Body control Module (BCM) in identifying which transmitter identifier was last received by the BCM.

Key Pressed on FOB - Scan tool displays None / Door Lock / DR Door Unlock / A// Door Unlock / Trunk / Fuel Door or Alarm

This input is used by the Body control Module (BCM) in identifying which transmitter button message was last received by the BCM.