Happy New Year! I moved to CO last year and have been spending a lot of time in the mountains. I came to the realization that sleeping in a camper is a way better option than sleeping in a tent, so I bought a 2016 Winnebago Minnie. Problem: The truck is underpowered and heating up on mountain passes when pulling the camper. Keep in mind these are steep and long passes at elevations of 10,000ft+. The truck has no overheating issues or power issues pulling the camper on flat land, but I am struggling to hold 25+ mph up steep passes at high elevations and the coolant/tranny are pushing above 240 degrees at which point I pull over and let her breath. Note: I am not bogging the engine down and I am manually dropping into 2nd gear to keep RPM's up. Disclaimer: I am NOT interested in purchasing a different or new truck. I am well aware that a DMax would solve this problem. I also have reasonable expectations. I do not expect to be able to modify my truck to sustainably pull a loaded camper at elevation holding 75mph up a grade... Specs: Loaded Camper Weight: ~6,500lbs Ambient Air Temps: Below 90 Truck 2003 Silverado 5.3 Stock Tow package (Tranny cooler) Superlift 5-6" Lift 35" Tires 3" Body Lift 4.56 Re-Gear CAI, Magnaflow Cat Back, Blackbear Tune 140,000mi on the clock Options for Discussion: Magnacharger Turbo Charger - http://www.andysautosport.com/turbo_kits/chevrolet_silverado.html Engine swap to a built 6.0 With any of the above options I realize there is risk to the 5.3 as well as the 4L60E. For the tranny I plan on upgrading the servo's to help it survive the extra power and if it bites the dust will need to move to a 4L80E. What do you guys recommend?