Express 2500 V8-6.6L DSL Turbo (2010)
Door/Trunk Ajar Indicator/Lamp: Description and Operation
Door Ajar Indicator Description and Operation
Door Ajar Indicator System Components
The door ajar indicator system consists of the following components:
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The body control module (BCM)
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The instrument panel cluster (IPC)
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The driver information center (DIC)
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The door ajar switch
Door Ajar Operation
The body control module (BCM) receives a discrete input from the door ajar switch to indicate the status of the door. The BCM then communicates this
status to the instrument panel cluster (IPC) via GMLAN serial data. The IPC, upon receipt of this message, will illuminate the door ajar message in the
driver information center (DIC) and also send a GMLAN serial data message to the radio to activate the door ajar audible warning when the following
conditions are met:
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The transmission is shifted out of PARK.
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The vehicle speed is greater than 8 km/h (5 mph).
