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Home >> Chevrolet >> 2006 >> Silverado 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 914 (Theft Deterrent System) >> Description and Operation >> Content Theft Deterrent (CTD) Description and Operation >> CTD Circuit Description >> Driver Door Cylinder Switch

Driver Door Cylinder Switch

WARNING: This page is about a different car, the 2007 GMC Sierra and 2007 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

The CTD system uses the driver door cylinder switch as a means to disarm the CTD system. When the driver door key cylinder is rotated, the driver door cylinder switch is closed. The driver door cylinder switch is monitored by the DDM. With the driver door cylinder switch closed, a ground signal is seen on the Driver Door Key Switch Signal circuit. The DDM will then send a serial data message to the BCM indicating that a valid key has been used to rotate the driver door cylinder and the CTD system should be disarmed.

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