You won't be able to get a new one--GM no longer builds them. However, there are plenty of those around, so finding a good, used one at a dealer shouldn't be a problem. Given the current fuel price drama, you might even save some cash. Quite a few people have traded their older, bigger cars on vehicles that are more fuel-efficient. Because there's little demand for big cars, you might be able to get one fully-loaded for very little outlay. Good luck!
Aerodynamics are for people who can't build engines. --Enzo Ferrari