Ben, maybe you can help me out with this, I emailed Matt 3 days ago about it and haven't received a reply. I am trying to use a store credit code and it keeps displaying expired.
GM factory warranty is fully transferrable, 3 year/36,000 mile bumper to bumper - 5 year/100,000 mile powertrain... As rich said, from the original purchase date.
I have both units and each serve there own purpose... If I had to choose one (even with the price difference), I would go with the Master Blaster. For me, it's much more versatile.