Thread: 2005 radio install

ok so i got an alpine gps for my car. i have onstar but i dont have monsoon. i dont care if i lose my onstar cuz im not going to use it. now the next question is there just a normal harness so i can hook up the h/u or do i have to buy that gmos-1 for 100 bucks (no thanks) what happend to the 6 dollar harness i used to buy at wal mart? does any one what a wire diagram so i can hard wire it in?

i found this link http://www.grandprixforums.net/radio_install_info.php but where do i use the part number at?