I'm hoping there is someone in the area that can help us out. Your help will be generously rewarded. It's a long story, so please bear with me. We left San Diego yesterday on our way to Park City, UT for a much needed vacation. About 10 miles outside...
I'm considering installing the 60 gallon RDS tank. many times I will pass through Arizona on my way to someplace nicer. And I can save $1 or more per gallon by not buying in California. The tank and install kit are about $725 delivered from Amazon ...
I have a 2011 Silverado 3500 HD with the Duramax. It gets about 12-13 mpg when towing, and about 16 when not. I don't know if that's "best", but it's good enough for me. And it's for sale with 12,800 miles on it, and still under factory warranty.
