GM Service Manual Online
For 1990-2009 cars only
Battery 1: The scan tool displays the current state of the battery in volts.

Dome Lamp Command: The scan tool displays On/Off to indicate the current state of the interior lamps as commanded by the body control module. The scan tool display will indicate On when the lamps are commanded On

DRL Relay Command: The scan tool displays On/Off. This output displays the commanded state of the daytime running lamp relay located inside the BCM.The scan tool display will indicate On when the lamps are commanded On.

Horn Relay Command: The scan tool displays On/Off. This output displays the commanded state of the horn relay located inside the BCM.The scan tool display will indicate On when the horn is commanded On.

Remote Lock Command: The scan tool displays Yes/No. This input displays Yes when the remote keyless entry transmitter lock button is pressed.

Remote Panic Command: The scan tool displays Yes/No. This input displays Yes when the remote keyless entry transmitter panic button is pressed.

Remote Unlock Command: The scan tool displays Yes/No. This input displays Yes when the remote keyless entry transmitter unlock button is pressed.