I hooked Up my avic d3 in my 2001 cadillac deville. I had to do a total hardwire(no harness used) how do i hook up the vehicle dynamics? Is it neccesary to hook up the VSS Wire? Where is the VSS Wire and what does it look like? thanks for any help

no, you do not need it, but here it is anyway

Speed Sense green/white cruise control module

The cruise control module is located under the hood on the drivers side inner fender.

How Do I Get The Vehicle Dynamics Proccessor to work

It works automatically