I am thinking in towing a 15000 LBS GCWR 5th wheel with a 2011 3500 Chevrolet Silverado durmax 6.6/Alison 3.73, 4x4 crew cab LB. The specs show on the TV the max towing weight is 16800 for a 5th wheel...
Two very good pieces of advise mentioned, dually rear end and exhaust brake and i'll toss in an 8' bed, these things are a definite must! Every time I see some bone-head pulling some mini-condo with a 1500 endangering everyone around him I really wonder what goes through some peoples minds.