I just sold my 5th wheel. With diesel fuel topping $7/gallon here in California, I can't see pulling a trailer at 12mpg. So, the question I have is....what can of MPG can I expect to get from my 2000...
My Duramax averages about 11.5 US mpg while towing the 5er, and my with my camper the same truck gets around 14. Hopefully you will see an improvement.