I'm not 100% sure on this, but it seems it does. I was advised to remove the pairings before I swapped the radio (i was putting in a bluetooth capable aftermarket unit). It seems you can't use those buttons for anything else though, unless you disable onstar. So... I think if you left your pairings there, it might actually work. However I don't think you'll be able to change them after, so make sure you have your pairings straight first. otherwise the SWC send/end buttons will then try to do Onstar calling.