GM Service Manual Online
For 1990-2009 cars only
8 Digit GM Part Number: Displays the part number for the control module.

Battery Voltage: Displays 0 to 25.5 volts. The battery voltage level at the module.

Calibration ID: Displays the calibration ID for the control module.

Component Serial # 8-11: Digits 8 to 11 of the component serial number of the control module.

Component Serial #12: Digit 12 of the component serial number of the control module.

Component Serial #13-1: Digits 13 to 16 of the component serial number of the control module.

Component Serial #17-1: Digits 17 to 18 of the component serial number of the control module.

Delay Acc. Bus Output: The scan tool displays On/Off. Display indicates the commanded state of the retained accessory power (RAP) system.

Door Jamb Switch: The scan tool displays On/Off. The input of the passenger door open switch, where a closed switch (passenger door open) is displayed as On.

Door Key Cyl. Unlock Sw.: The scan tool displays On/Off. Display indicates the state of the door lock cylinder switch.

Door Lock Output: The scan tool displays On/Off. Display indicates the commanded state of the BCM door lock output.

Door Lock Switch: The scan tool displays Idle/Lock/Unlock. Display indicates the state of the power door lock switch.

Driver Door Ajar Sw.: The scan tool displays On/Off. Display indicates the state of the driver door ajar switch.

Driver Door Jamb Sw.: The scan tool displays On/Off. Display indicates the state of driver door jamb switch, where a closed switch is displayed as On.

Driver Unlock Output: The scan tool displays On/Off. Display indicates the commanded state of the BCM driver door unlock output.

D.R.L. Output: The scan tool displays On/Off. The commanded state of the DRL relay.

Exterior Lamp Output: The scan tool displays On/Off. The commanded state of the exterior lamp control terminal.

Front Fog Lamp Relay: The scan tool displays On/Off. The commanded state of the front fog lamp relay.

Fuel Door Rel. Output: The scan tool displays On/Off. Display indicates the commanded state of the BCM fuel door release output.

Fuel Level: The scan tool displays the fuel level in gallons.

High Beam Output: The scan tool displays On/Off. The commanded state of the high beam control terminal.

Horn Output: The scan tool displays On/Off. Display indicates the commanded state of the BCM horn output.

Ignition Counter: The BCM counts each time the ignition is cycled up to 255 counts. If any BCM DTC is set, or battery voltage is interrupted the ignition counter resets.

Ignition Switch: The scan tool displays Accessory, Off/Lock, Off/Unlock., Run, Crank. Display indicates the state of the ignition switch.

Inadvert. Power Output: The scan tool displays On/Off. The commanded state of the inadvertent power control.

Interior Lamp Output: The scan tool displays On/Off. The commanded state of the interior lamp relay.

Julian Date of Build: The scan tool displays year and day. The first digit indicates the last digit of the year that the control module was built. The remaining 3 digits indicate the day of the year that the control module was built.

Low Beam Output: The scan tool displays On/Off. The commanded state of the low beams control.

Low Power Output: The scan tool displays On/Off. Display indicates the commanded state of the low power output.

Park Lamp Relay Output: The scan tool displays On/Off. Display indicates the commanded state of the BCM park lamp relay output.

Park Relay Output: The scan tool displays On/Off. Display indicates the commanded state of the BCM park relay output.

Passenger Door Ajar Sw: The scan tool displays On/Off. Display indicates the state of the passenger door ajar switch.

Passenger Unlock Output: The scan tool displays On/Off. Display indicates the commanded state of the BCM passenger door unlock output.

PROM ID: The scan tool displays the PROM ID for the control module.

Real Time Clock Hours: The scan tool displays Hours. Display indicates the time of day in hours. If the BCM detects a loss of keep alive memory, the clock will reset to 12:00 AM.

Real Time Clock Minutes: The scan tool displays Minutes. Display indicates the time of day in minutes. If the BCM detects a loss of keep alive memory, the clock will reset to 12:00 AM.

Real Time Clock Seconds: The scan tool displays Seconds. Display indicates the time of day in seconds. If the BCM detects a loss of keep alive memory, the clock will reset to 12:00 AM.

Rear Fog Output: This parameter is not used. Rear fog lights are not available on this car.

Rear Defog Output: The scan tool displays On/Off. When the rear window defogger switch is depressed, the scan tool will momentarily display On.

Reverse Relay Output: The scan tool displays On/Off. Display indicates the commanded state of the reverse relay.

Theft Deterrent: The scan tool displays Armed, Arm Delay, Armed Initiate, Off, Ready. Display indicates the state of the theft deterrent system.

Trunk Ajar Switch: The scan tool displays On/Off. Display indicates the state of the trunk ajar switch.

Trunk Release Output: The scan tool displays On/Off. Display indicates the commanded state of the BCM trunk release output.

Trunk Tamper Switch: The scan tool displays On/Off. Display indicates the state of the trunk tamper switch.

Valet Lockout Switch: The scan tool displays On/Off. Display indicates the state of the valet lockout switch.

Year Module Built: Displays the year that the control module was built.