im tryin to help my friend get a new cd player in his gf's car. she got a 02 Cavalier z24.. he already got her a new pioneer cd player.. i cant find which harness we need tho. it does not have onstar or bose... i just used the walmart chime retention interface on my 03 monte, but it say 03-up and this one is an 02.. not sure if it matters, but i wanna be sure before have him waste $40