vss wire, 07 silverado

i just installed the avic-d3 in 07 silverodo new body style can any till me were the vss wire is...........

 there is not a yellow and black wire at pin 57 ??//?

GREEN / WHITE(i believe) at the abs pump under vehicle inside driver frame rail,,,I've never seen one at the ECM,,,its not there,,,

There should be a VSS wire inside, The junction block driver side floor( where all the accessories plug in).  On the back side there will be two brown plugs (I'll have to double check my notes at work tomorrow). The lower plug will have a GREEN / WHITE wire in it. Thats the VSS wire.The moving power of mathematical invention is not reasoning but imagination.

Augustus de Morgan

i did find a yellow/black wire at the ecm in the 07 I did the other day. I tested it with my DMM and it seemed like it worked (changed w/ speed). However, when I hooked it up to the D3, instead of showing between 1 and say 10 for speed pulse, it was going from 1 all the way up to around 200... but it was 100% linked w/ speed (tried just revving to check it possibly tach). It just seemed like it was producing more pulses than a normal vss. Either way, the screen wouldnt read it, so I disconnected the wire, and explained my findings to the customer. He didnt seem to mind, so I sent him on his way. What else could that wire have been besides speed pulse???Kenny

Owner / Technician

KKD Garage LLC

Albany, NY 12205

have to get it at the wheel the speed sensor is there.

Ranger is right. I do them all the time, go to the junction block under the dash next to the brake pedal. Unclip it and spin it around. The big plug in the center, GREEN / WHITE. Very easy to get there....Mike M2

Tech Manager

CS Dealer Services