i am going to be doing the big install of getting a DD player into my 02 yukon denali...i went to my local walmart where they have scosche Products for Auto Stereo installation...I am looking into not keeping my On-Star and Door Chimes if not needed...and just doing a straight up install on my truck..i have the Bose System on my Truck...What wiring shoud i get for my truck and what Mounting Kit should i get for the same truck..I am getting my DD Stereo in a few Days and need to go and pick up this stuff...I would really appreciate it if someone can answer my question....I have read tons of threads regarding this situation and some said that their truck wont even start without this GMOS-04 or something like that...do i need to purchase this also even though i dont want the on-star and Chimes..