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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1557 (Door Lock System & Door Handles) >> Diagnostic Information and Procedures >> Power Door Lock Key Cylinder Switches Inoperative >> Circuit/System Description

Circuit/System Description

WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, 2010 Chevrolet Silverado, and 2010 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

The key cylinder unlock feature will unlock the driver door only with a single turn to the unlock position and all of the doors when the driver door switch (DDS) receives two consecutive turns to the unlock position and will send a request to the passenger door switch (PDS) and the BCM to unlock all of the doors.

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