GM Service Manual Online
For 1990-2009 cars only

Body Control Module (BCM)

Scan Tool Parameter

Additional Menu Selection(s)

Units Displayed

Typical Data Value

Operating Conditions: Ignition ON, Engine OFF, All Doors and Trunk Closed, Vehicle in PARK or NEUTRAL.

Battery Voltage

BCM/Data Display/Keyless Data

Normal/Out of Range

Normal

Door Ajar Switch

BCM/Data Display/Keyless Data

Door Closed/Door Ajar

Door Closed

Door Lock Switch

BCM/Data Display/Keyless Data

Volts

Varies

Door Lock Switch

BCM/Data Display/Keyless Data

Idle/Lock/Unlock

Idle

Driver Door Ajar Sw.

BCM/Data Display/Keyless Data

Door Closed/Door Ajar

Door Closed

Driver Door Lock Actuator Command

BCM/Data Display/Keyless Data

Idle/Lock/Unlock/Invalid

Idle

Passenger Door Lock Actuator Command

BCM/Data Display/Keyless Data

Idle/Lock/Unlock/Invalid

Idle

Trunk Ajar Switch

BCM/Data Display/Keyless Data

Trunk Closed/Trunk Ajar

Trunk Closed

Trunk Motor

BCM/Data Display/Keyless Data

Off/On

Off

Trunk Release Solenoid Command

BCM/Data Display/Keyless Data

Off/On

Off

Trunk Release Switch

BCM/Data Display/Keyless Data

Inactive/Active

Inactive