Cadillac XTS: GM's plug-in hybrids live

It's not just about Voltecs?

Hang around some of GM's Chevy Volt team and you'll be corrected every time you call the Volt a plug-in hybrid. While technically true, GM wants the Volt to be seen as an electric vehicle, a range extended electric vehicle.

And there just might be some logic for this distinction. For years GM has contemplated a plug-in hybrid powertrain based off the dual mode hybrid drive train. In fact, GM developed a fully functional Saturn Vue plug-in hybrid based off this technology in the past.

Today, GM debuted another plug-in hybrid, the Cadillac XTS Platinum Plug-in Hybrid Concept. With a 3.6-liter V6 engine and electric motors to drive all four wheels, the XTS platinum will provide about 350 hp. The ever important battery pack can be fully recharged in about five hours from a standard electrical outlet.

More interesting than the car, however, is the possibility that GM's plug-in future is shaping up to be about more than just Voltecs.