Have I been doing it wrong all these years?
I have been towing our 30ft fiver for years with a Silverado 2500 Duramax. Have been using the tow mode and get right around 12MPG. Today we headed out. I zeroed out the trip computer before leaving. ...
Forum Discussion
If you're only going to keep the truck a couple years without a lot of miles then what odds. OTOH if you are going to keep it long term you can save a few bucks on fuel but eventually spend a lot of bucks on transmission. IMO at the very least follow the severe duty service schedule for AT fluid and filthers.
