I have had a avic N1, D1, and now i am getting the Z1 and i have had a problem with a "irregular speed pulse" on the wire that i was told. no can't remember now which one now it has been a year or so, but i was looking for someone who has done it and had it work on this truck

Speed Sense yellow/black PCM, blue plug, pin 25
The PCM (Powertrain Control Module) is on the passenger side firewall under the hood.