Does the 2008 GMC Yukon have Bluetooth?

No, sadly, Your 2008 GMC Yukon does not come with any capability for bluetooth off the assembly line. Had You bought a 2009, though, You'd have it... In the form of the rather subpar Onstar pay-for-service offering. If You're feeling adventurous, though, and don't need the Onstar functionality, but just want to use bluetooth connectivity to make phone calls and listen to some music, there's a bit of a hack You can do. Get a VCIM from a 2009 or 2010 and install it in Your 2008. Some drivers claim that Onstar even still works after You do this, but, for a little less than $200 and a time investment of a quarter of an hour, You can have bluetooth in Your 2008, too!