Tow haul button
I have a 04.5 duramax 3500 and I'm not sure when to use the tow/haul button on my gear shift also using this will it help my MPG? Thanks.
Forum Discussion
n7bsn wrote:Er, not quite! When the engine is braking the fuel is cut off, ie NO fuel is being used at that point.
But no, they don't help MPG, for example, down hill they can force the vehicle into a lower gear (engine braking) which consumes more fuel
But in general I agree that Tow/Haul will not improve mpg, but it will help the transmission stay cooler.
