Yukoners wrote:
I looked up towing capacity for your truck and they show 11,500 lbs.:)
2014 GMC 1500 with 5.3
Fine print - "Based on Wardsauto.com 2013 Large Pickup segment and last available information at the time of posting. Maximum trailer weight ratings are calculated assuming base vehicle, except for any option(s) necessary to achieve the rating, plus driver. The weight of other optional equipment, passengers and cargo will reduce the maximum trailer weight your vehicle can tow. See your dealer for additional details."
Not sure why a GM product web page would footnote performance figures to Ward's Auto but the same GM website above shows for a 5.3 Crew Cab, you'd need a 4x4 with the 3.73 rear end and with the max trailering package and a short box to get 11,300# for a 5th wheel hitch. Didn't see the 11,500# which could be for a not-shown / not offered (?) 4x2 with the same configuration. Two wheel drive is typically good for 300# more than 4x4 on these trucks.
As for the "max trailering package" - you'd have to do a bit of a search to find that it consists of -
Trailering package with seven-pin and four-pin connector
Enhanced cooling
Automatic locking rear differential
Heavy-duty 9.75-inch rear axle with 3.73 ratio
Increased-capacity rear leaf springs
Revised shock tuning for increased control
Integrated trailer brake controller
So one can't look at engine and payload alone to get an assumed max tow capability as many other things are to be considered. IMO, it is more important to look at max effective towing capability, which for medium duty trucks, is limited by payload unless one is towing a flat trailer and sway is non-existent or controlled by means other than load distribution.