I’m new on here and have looked at a lot of previous threads but still confused. I bought a 2011 GMC Sierra 1500 sle. I’ll pick it up Friday. It has a 6.2, 3.73 gears, 6l80 transmission. I bought it to pull my camper. Has factory fifth wheel and receiver, towing package with factory brake controller. Thought it was capable of towing around 10000 lbs. I hope I didn’t make a mistake. My camper weighs 5200 lbs dry 7200 lbs fully loaded. Any help would be appreciated. It does have tranny cooler and oil cooler from factory according to the rpos.