GM Service Manual Online
For 1990-2009 cars only
Battery Voltage: The scan tool displays 0-25.5 volts. The state of the battery voltage supplied to the body control module (BCM).

Door Lock Output: The scan tool displays On/Off. The BCM output to the door lock actuators, where Lock is displayed as On.

Door Lock Switch: The scan tool displays Active/Inactive. The driver or passenger door lock switch input to the body control module (BCM), where the switch transition to the Lock position is displayed as Active.

Door Unlock Output: The scan tool displays On/Off. The BCM output to the passenger door lock actuators, where Unlock is displayed as On.

Door Unlock Switch: The scan tool displays Active/Inactive. The driver or passenger door lock switch input to the body control module (BCM), where the switch transition to the Unlock position is displayed as Active.

Driver Door Switch: The scan tool displays Open/Closed. The driver door switch input to the body control module (BCM), where an open door is displayed as Open.

Driver Unlock Output: The scan tool displays On/Off. The BCM output to the driver door lock actuator, where Unlock is displayed as On.

Software Part Number: The scan tool displays the part number of the BCM.