For 1990-2009 cars
2nd to Last Alarm Cause: The scan tool displays the 2nd to last cause of the Content Theft Deterrent (CTD) alarm condition.
3rd to Last Alarm Cause: The scan tool displays the 3rd to last cause of the CTD alarm condition.
4th to Last Alarm Cause: The scan tool displays the 4th to last cause of the CTD alarm condition.
5th to Last Alarm Cause: The scan tool displays the 5th to last cause of the CTD alarm condition.
6th to Last Alarm Cause: The scan tool displays the 6th to last cause of the CTD alarm condition.
7th to Last Alarm Cause: The scan tool displays the 7th to last cause of the CTD alarm condition.
8th to Last Alarm Cause: The scan tool displays the 8th to last cause of the CTD alarm condition.
8 Digit GM Part Number: The scan tool displays an 8 digit part number. This number is the GM part number that is stored within the BCM memory.
Battery Voltage: The scan tool displays 0.0-25.5 volts. The Battery Voltage represents the system voltage measured by the BCM at its battery feed.
Brake Switch: The scan tool displays the current status of the Brake Switch.
Brake To Shift Lamp Output: The scan tool displays the current status of the Brake To Shift Indicator Control.
Button Pushed on FOB: The scan tool displays and confirms that a button has been pressed on the Keyless Entry key fob.
Calibration ID: The scan tool displays a 4 digit number. This calibration ID is the check sum of the BCM read only memory contents.
Component Serial #8-11: The scan tool displays digits 8 through 11 of the BCM serial number.
Component Serial #12: The scan tool displays digit 12 of the BCM serial number.
Component Serial #13-16: The scan tool displays digits 13 through 16 of the BCM serial number.
Component Serial #17-19: The scan tool displays digits 17 through 19 of the BCM serial number.
Courtesy Switch: The scan tool displays the current status of the manually operated courtesy lamp switch.
D.R.L. Output: The scan tool displays Active/Inactive showing the status of the Daytime Running Lamps(DRL)/High Beam Relay Control.
Delay Interior Output: The scan tool displays Active/Inactive showing the status of the Delayed Interior Lamps Relay Control.
Door Jamb Switch: The scan tool displays On/Off. The scan tool displays On when any of the vehicle doors is opened.
Door Lock Counter: The scan tool displays 0-255. This is an internal time-variable counter that is used by the BCM software to protect the door motors from repeated lock/unlock cycles.
Door Lock Output: The scan tool displays Active/Inactive showing the status of the Door Lock Relay Control.
Door Lock Switch: The scan tool displays On/Off. The scan tool will display On when any of the Door Lock switches are pressed.
Door Unlock Output: The scan tool displays Active/Inactive showing the status of the Door Unlock Relay Control.
Driver Unlock Output: The scan tool displays Active/Inactive showing the status of the Driver Door Unlock Relay Control.
Exterior Lamp Output: The scan tool displays Active/Inactive showing the status of the Exterior Lamp Power supply to the Low Beam and Park Lamp relays.
Fuel Door Rel. Output: The scan tool displays Active/Inactive showing the status of the Fuel Door Release Relay Control.
Head Lamp Switch: The scan tool displays On/Off showing the Headlamp Switch is in the headlamps position.
Headlamp Required Output: The scan tool displays Active/Inactive showing the status of the Headlamps On Required Control.
High Beam Output: The scan tool displays Active/Inactive showing the status of the High Beam Relay Control.
Highbeam Switch: The scan tool displays On/Off. The scan tool displays On when the High Beam Switch is on, or the Flash to Pass switch is activated.
Horn Output: The scan tool displays Active/Inactive showing the status of the Horn Relay Control.
Ignition Counter: The scan tool displays 0-50. The BCM increments this counter with each ignition cycle. This counter is used for clearing DTC codes.
Ignition State: The scan tool displays the ignition switch status. An example would be Run. Run is displayed when the ignition switch is on but not cranking.
Interior Lamp Output: The scan tool displays Active/Inactive showing the status of the Interior Lamps Relay Control.
Julian Date of Build: The scan tool displays a 3 digit number. An example would be 723. 723 is July 23 which is day 204 based on the Julian Calendar.
Key Disarm Input: The scan tool displays On/Off. The scan tool will display On when the Key Disarm switch has been activated.
Key In ignition: The scan tool displays Yes/No to show if the key is in the ignition switch.
Last Alarm Cause: The scan tool displays the last cause of the Content Theft Deterrent (CTD) alarm condition.
Last Fob Used: The scan tool displays the number of the last key fob that was used to lock/unlock the vehicle.
Low Beam Output: The scan tool displays Active/Inactive showing the status of the Low Beam Relay Control.
OnStar: The scan tool displays Active/Inactive. The scan tool displays Active when the air bag has been deployed.
OnStar Test Flag: The scan tool displays Received/Not Received. The scan tool displays Not Received when OnStar fails to send a pulse during the current ignition cycle.
Outside Status: The scan tool displays Day/Night showing the status of the Twilight Sentinel Input.
Park Lamp Relay Output: The scan tool displays Active/Inactive showing the status of the Park Lamp Relay Control.
Park Lamp Switch: The scan tool displays On/Off showing the Headlamp Switch is in the park lamps position.
Park Position Input: The scan tool displays On/Off. The scan tool displays On when the transmission select lever is in the Park position.
PROM ID: The scan tool displays a 4 digit number. This number is the programmable read-only memory (PROM) ID.
Real Time Clock Hours: The scan tool displays a number that represents the hours for the current time of day.
Real Time Clock Minutes: The scan tool displays a number that represents the minutes for the current time of day.
Real Time Clock Seconds: The scan tool displays a number that represents the seconds for the current time of day.
Rear Compartment Lid Release: The scan tool displays Active/Inactive showing the status of the Trunk Release Relay Control.
Run/Crank: The scan tool displays On/Off. The scan tool displays On when the ignition switch is in the Run or Crank positions.
Security Lamp Output: The scan tool displays Active/Inactive showing the status of the Security Indicator Control.
Theft Deterrent: The scan tool displays Off/Idle/Disarm/Ready/Arm Initiate/Arm Delay/Armed/Alarm showing the status for the Content Theft Deterrent System.
Trunk Jamb Switch: The scan tool displays On/Off. The scan tool will display On when the rear compartment lid is opened.
Twilight Delay: The scan tool displays a digital value that corresponds to the position of the Twilight Sentinel Delay control.
Twilight Lamp Output: The scan tool displays Active/Inactive showing the status of the Twilight Sentinel Indicator Control.
Wiper Activation Switch: The scan tool displays On/Off. The scan tool displays On when the wiper system is being used.
Year Model Built: The scan tool displays what year the module was built.