GM Service Manual Online
For 1990-2009 cars only
Table 1: Body Control Module (BCM)
Table 2: Driver Door Switch (DDS)
Table 3: Passenger Door Switch (PDS)

Body Control Module (BCM)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: Ignition ON/Engine OFF/All Doors Closed

Ext. Trunk/Liftglass Rel. Sw.

Body Rear End

Active/Inactive

Inactive

Int. Trunk/Liftglass Sw.

Body Rear End

Active/Inactive

Inactive

Trunk Release Solenoid Command

Body Rear End

Off/On

Off

Door Lock Requestor

Doors

Power Lock/Door Key Cyl./Rear Closure/Emergency/Keyless Entry/Passive Keyless/Remote/Delayed Lock/Relocking/Anti-Lockout/Exterior Switch/Auto Locks/

Varies

Drvr. Door Unlock Cmd.

Doors

Off/On

Off

Left Rear Door Ajar Sw.

Doors

Door Ajar/Door Closed

Door Closed

Passenger Door Open Sw.

Doors

Open/Closed

Closed

Rear Doors Lock Cmd.

Doors

Off/On

Off

Rear Doors Unlock Cmd.

Doors

Off/On

Off

Right Rear Door Ajar Sw.

Doors

Door Ajar/Door Closed

Door Closed

Valet Switch

Inputs

Active/Inactive

Inactive

Driver Door Switch (DDS)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: Ignition ON/Engine OFF/All Doors Closed

Battery Voltage Signal

Data

Voltage

Varies

Door Key Cyl. Unlock Switch

Inputs

Idle/Unlock

Idle

Driver Door Ajar Sw.

Inputs

Active/Inactive

Inactive

Driver Door Open Sw.

Inputs

Active/Inactive

Inactive

Door Lock Actuator Cmd.

Outputs

Off/Lock/Unlock

Off

Passenger Door Switch (PDS)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: Ignition ON/Engine OFF/ALL Doors Closed

Battery Voltage Signal

Data

Voltage

Varies

Passenger Door Ajar Sw.

Inputs

Active/Inactive

Inactive

Passenger Door Open Sw.

Inputs

Active/Inactive

Inactive

Door Lock Actuator Cmd.

Outputs

Off/Lock/Unlock

Off