radio harness question

[ham4864]

i dont care if i loose rap or the chime on my 04 grand prix.Whats the cheapest harness that i could purchase that plugs into the factory harness.

i will be running new speaker wire and i think the only other wires i will need are 12volt constant from battery,12volt ignition from pink wire @ ignition and ground to chassis.If i am leaving something out please let me know.

But i just need a basic harness the mates up to the factory.

I was looking at the g6 0r g8 is this correct.

after looking around on the net i found a metra70-2003 this will work correct

[OmegaRed]

GM Factory Integration Adapter General Motors OnStar® data bus interface Retains OnStar and factory door chime with aftermarket radio in select GM vehicles at Crutchfield.com

click that link

its 100 bucks but half off if you get a deck to go with it... thats the route im going, i wouldnt want to go cheaper but i want my **** to work still

[ham4864]

that harness is not compatible with Bose or monsoon at least that's what it says