It is not a Grateful Dead song. They may have covered it at some point, as did many others. the song was written by Robbie Robertson of the Band, and they are the ones performing it in the ad.
> Yeah that's a Grateful Dead song called "The Weight". But it's not the dead doing it in that commercial. I'm actually trying to figure out who it is. Long live the dead.
> > > Anyone know what song is playing in the new AT&T/Cingular commercial with the man driving across the country to San Fransisco to meet his girlfriend?
> > >
> > > Thanks