Jmshipton

Ok, so did a bit of research, installed the vcim# 20787107 w/ BT antenna on my 2007 GMC Denali. Works great! AND...I Have working onstar. I pushed the red button, told her I wanted to test my system, she said that it had NEVER been activated and transferred me to another lady who did. I linked my onstar to my vin# and I was good. Hope this helps. Seems I may be the only one who did this successfully AND posted it....cause I cannot be the first to get this right!!!! Bought it from Source One Auto Parts on EBAY for $250 flat. Included the Bluetooth antenna as well for that price, great seller. Followed your advise and pictures to the letter, GREAT help. Thanks and happy new year!