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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1631 (Theft Deterrent System) >> Diagnostic Information and Procedures >> Pickup Box Bed Sensor Inoperative >> Circuit/System Description

Circuit/System Description

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The bed sensor is a component of the content theft deterrent (CTD) system which monitors the status of the tailgate. The body control module (BCM) applies B+ to the bed sensor signal circuit. The bed sensor is a switch that opens and closes based on the position of the tailgate. With the switch closed, the signal circuit is switched to ground, indicating the tailgate has been opened. If the content theft deterrent (CTD) system is armed and the BCM sees the tailgate open, the CTD alarm will be activated.

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