6.6 Chevy gas engine
? For any one with the new chevy 6.6 gas . About what is your fuel mileage not towing ? If you have towed with it fuel mileage
Forum Discussion
the trans(10 speed) behind the 6.6 duramax diesel is an Allison branded trans, whatever that means and the one behind the 6.6 gas is manufactured by GM. (6 speed)
