Quote Originally Posted by Daveo91 View Post
No worries, the “normally open/closed nomenclature” is a bit confusing for a switch that in the normal state has the button pushed. I think my factory cruise system does use vacuum tho - the switch originally did have a vacuum line attached to it.it’s still under the dash, plugged.

sounds about right. So there’s no vacuum at all on the GMT400 cruise system? Uses an electric control to open and hold the throttle? That’s the system I want to convert to but I have the stuff from a vortec truck.
On the "Normally Open" terminology in this case it would be normally open held closed. The switch springs to open when released.

IDK if the 96+ cruise gets the same signal as the 88 - 95. I think 96+ is 4,000 PPM where 88 - 95 VSS is 2,000 PPM? I don't know about 95, it was an odd year.