hello, on the stock stereo in my truck it has the auto volume on it, where the faster you drive the louder it gets, and when you slow down it gets lower. is that controled by the speed senser, or something else?

if it is, will it be in the radio harness?

where is the vss in the truck.

thanks.

i have a avic-d2

no its through data, my hhr had the same thing, but there is no speed sense in my car.

Speed Sense yellow/black PCM, blue plug, pin 25

Notes: The PCM (Powertrain Control Module) is on the passenger side firewall under the hood.