Thanks for the replies for far. Im running stock LT265/70R17 tires with no plans to change tires sizes. The truck has the 5.3 Vortec with a 6-speed auto trans, the heavy duty cooling and trailering (not Max Trailering) packages. Im looking to improve the vehicle towing performance. The travel trailer I plan to tow is 34 feet long Grand Design. The trailer sticker claims an unloaded weight of 7,300 pounds and a GVWR of 8,995 pounds. GM claims a tow rating of 9,600 lbs with the 3.42 gear. Id be more comfortable with more gear to keep from taxing the engine and tranny more than necessary. Im thinking 3.73 is the minimum gear I should pick. Is that going to be enough?
Thanks again.