Considering replacing the old girl - 04 8.1 Yukon XL as her electrical gremlins and module failures are becoming increasingly frequent. Plan 1 had been max payload SCrew with max tow pkg but then saw...
The 6.2 gas with 4.30 gears will have better engine braking than with 3.73 gears. There is no exhaust brake for the gas engines, that I am aware of. Using lower gears in the transmission accomplishes engine braking with a gas engine.