Dan - I tow an open all steel trailer with a 2004 Silverado SB 1500. It has the 5.3 engine and 3.73 gears w/automatic. I have no idea of the trailer weight, but it has to be way heavier than a aluminum version. Trailer has brakes and the truck does very well, but I don't tow over 65mph. A recent addition of Helwig air bags made it much better to tow with...no more scissor action after road dips. I like to keep an eye on intervals due to what I feel is marginal braking with this set-up.
