motorola t 605 to 2005 chevrolet

Hey All,

I am trying to install a T-605 Handsfree Kit into my 2005 Equinox. I got a GMCellV2 harness that stated for the Equinox and hooked it up as designed, but it does not work. The Audio Portion is working great and The sound comes through all speakers, but that works on an RCA Cable through an FM Mod.. On the Phone End, I cannot get the Radio to Mute and Go into Phone Mode, and Pump the Call through any speaker. I do not want to use the External speaker that came with the kit, and am looking for it to work like the onstar system where the Radio displays Phone and the call comes out the car speakers, or driver side speaker. I think I am not using the right harness wires. Does anyone know what wires on the stock Harness I need to hook the Mute, Line Out +, and Line out - to, or should I be using Speaker Out + and Speaker Out - in place of Line Out.

Alright, found a lot out on my own. I know what all the wires on both harnesses are, the pinouts, and wire colors. I believe the 12 pin harness is the only one involved in getting call through the stereo speaker, and to signal a mute on an incoming call. The 12 pin harness has 5 wires which are

Cel Tel Voice Signal / Navi Signal (+)

Cel Tel Voice Low Ref / Navi Audio Signal (-)

Audio Common

Left Audio Signal (+)

Right Audio Signal (+)

The Motorola T-605 wants me to hook up Constant 12V, Switched 12V, Ground, Mute, Line Level In +, and Line Level in -. I know how to do the first 3, but which one of those 5 wires is the Mute, Line Level in - and Line Level In + going to?