Sierra 1500 2WD V8-5.3L Hybrid (2004)
Door Switch: Description and Operation
DOOR LATCH (DOOR JAMB) SWITCHES
The theft deterrent system uses the door key switch as one method in order to activate the alarm. If the BCM detects any door opening before the BCM
receives a disarm input, the alarm mode activates.
DOOR KEY SWITCH
The BCM monitors the door key switches in order to disarm the CTD system. When the lock cylinder turns in order to unlock the door, the switch
grounds the disarm input to the BCM.
