It does. Remember your first 3 speed bike or better yet a 10 speed? Try taking off in the high gears was brutal but the liw gears made it effortless. Same principle as a truck.
GM liked to use 3.08 gears, 3.42, 3.73, and 4.10. The first two gears I listed were worthless in a truck before the 6 speed auto masked it with a ultra low 1st and 2nd gear. The tow ratings with a 3.08 and 4 speed was about 6000# and the 3.42 not much better.
The 6.0 is a reliable motor but a little gutless without the 4.10's behind it with the 4 speed. Its gas hungry, about 12mpg empty and 8 towing. The 3.73 gears are ok with the 6 speed but still no match for a better engine.
Chris