GM 6.6 & 3:73
Looking for actual input, experience not opinions without experience. Anyone that has a GM, 6.6 gas with 373 gears, towing I would like to know your experience with towing power, fuel mileage and ove...
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Then sorry can't help. Last gasser I had was a 1987 Silverado 1500 with the 350/5.7 On my third Duramax 2005, 2011, and current 2018 pulling three different Fifth Wheels, but very close to the same mileage with all combinations.
