LS factory cruise control hook up

[valis4nu]

I am in the process of designing and building a tester module for this model of cruise control module (CCM) as I have replaced it twice on my 92 Buick Roadmaster without success. The only thing I am not sure about is how to simulate the input from the PCM (VSS) that goes into Terminal K (green wire) of the CCM. I know that it is a 5-volt signal, but that is all.

I found a GM video on YouTube regarding this CCM on a 91-93 Buick Roadmaster. It stated that the Speed Sensor Module (SSM) on the driveshaft produces an AC voltage of anywhere from 2-100 VAC. This signal is fed into the Vehicle Speed Sensor (VSS) which in turn feeds Terminal K on the CCM. But the video confused me on one point in that it stated that the voltage of that wire is actually a ratio of 1.1 volts per 1 mph.

Here is the link to that video:
https://www.youtube.com/watch?v=Q5SEy9GwQIw

Advice and suggestions are most welcomed. Thanks!