Key Cylinder Switches - 2001 Chevy Venture

There was a post in the automotive forums recently saying that the Key Cylinder Switches in the driver and passenger doors did not operate properly (wound not unlock).
Here is some information I gathered from a couple of repair manuals for my own van.

The door locks are controlled by the Body Control Module (BCM).  They will lock or unlock when a few things happen, such as the key cylinder switch is turned and held in position for more than 1 second in either the driver or passenger door (see schematic below).

Here is the schematic for the Key Cylinder Switches.  Click on it for a larger view.
Key Cylinder Switch Schematic

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