The saddest part of all is GM used to the opposite, Funked.  My 1990 Caddy has a mammoth interior (the BACK seat has more legroom than most cars FRONT seats), yet the car weighs in at a rather modest 3400 pounds.   This is comparible to something like a Subaru WRX, which has considerably less space for its occupants and still weighs better than 3000 pounds.   
For additional comparison, a Ford Taurus weighs within 100 poinds of my Cadillac (a little over 3300 for a Taurus), yet is a much smaller car inside.  Heck, the poor Ford doesn't even get the V-8  that my Caddy has to lug around....that probably explains most of the weight difference.
Where is that weight going?   I have nothing against large cars, if there's a POINT to it.....however, too many new designs seem to be gaining weight for absolutely no reason.  I swear, the domestic automakers (especially GM) are determined to run themselves into the ground.  Weight-gaining and price inflation aside, most of the newer models are butt-ugly too.  
J_A_B