I was wondering if anyone has any experience with installing an aftermarket deck into a 2007 Montana Sv6. I've been doing some reading and am worried about some of the features. I'm not really worried about losing certain feaures. I will never use onstar. I don't care if my stereo runs after I turn the car off. I just don't want to hook this thing up and have my battery drain. Any info would be greatly appreciated.
