when looking at the 2010 and up 1/2 subs and Tahoe's be careful there a lot of them out there with 3.08 gears witch you will not like for towing also look for the k5l option which is the heavy duty tow package. It gives you the aux trans cooler and engine oil cooler mandatory 3.42's and the ability to tow 8200lbs other without ut you are rated at 6500lbs. the 2007-2008 have the 4 speed auto's and 3.73 gears. The 6 speed of the newer ones tows better just dont be scared to put the trans in a lower gear. The 2500 Subs and Yukons get a leaf spring suspension in the rear and a 37 gallon fuel tank. Which one of the Gm sport utes you get you are limited to 1000lbs of tongue weight. Also try to find one with the integrated brake controller ..you will love it vs an aftermarket one.
