by kc4sbd » March 10th, 2013, 9:52 am
I just installed my costar in my 2008 Tahoe, which has navi, you can look on you tube and find the video to demo the removal of the faceplate around the radio,a/c controls the bank of buttons below the temp controls. the xm module is located on the bottom and is silver with a Contential sticker on it, it is extremely tight but even with my big hands I got it out removed J1 & J2 pushed those two cables behind the unit reinstalled everything and placed the costar basically on the floor board hidden behind the center console, and it works like a charm,