Hi I have a general question. My truck is a 2006 GMC Sierra 1500, 5.3 auto, w/3.55 gears and the towing pkg. I'm considering buying a bigger travel trailer. The owners manual says I can tow 7k or 9k with 3.73 gears my question is what has anyone towed on a regular basis and how did it perform over the long haul. I dont want to be stuck in the slow lane all the time or overtaxing my engine and trans, we travel through the Rockies and west so what has been anyones 1/2 ton experience's.