I have a iPhone 3G that I have paired with my laptop for bluetooth laptop tethering. I am buying a new 2011 GMC truck. According to the GMC website my truck and phone are compatible, but if I have the phone paired to my laptop already will it let me? Can the iphone pair with both a vehicle and a laptop at the same time if they are not being used at the same time? I won't try to tether my laptop with my iphone when I am using it handsfree in the truck! I really don't want to have to forget and pair everytime I come and go from the two options.... truck and laptop! Thanks~!!!