I just purchased (5/31/04) a 2004 Silverado 1500 with the crew cab and short bed, Z71 with the trailor towing package. What a mistake!!! Since I returned the vehicle the day after I bought it, I should be able to get my money back.
Every time I went over a bump of any size, the cab reverberated horizontally, about 3 times. If I caught the road bumps just right (or just wrong, you might say), it went into a bucking bronko type scenario. This is not a stiff ride issue, this is an oscillation issue in a different plane than the initial bump.
I understand this 1/2 ton crew cab with the 5.8 foot bed is a brand new design. Well, when it is coupled with the Z71 package and the trailer towing package, it equals disaster!
Be warned, the rest of you considering such a move.