SCOTTYINWV
si vis pacem, para bellum
They did make sf14 bolt axles in a 14 bolt. Just because it's 6 lug doesn't mean it's 10 bolt.
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F44 is just listed as chassis: heavy duty.
Vin breakdown would be required for more detail.
Typically, it means you get the heavier suspension and 14b semifloting rear axle.
But that doesn't mean they didn't come with 10b rears.
Gm is known for doing some oddball things from time to time.
Hold on a tick. The op is a 1500. I missed that first time around.
F44 on a 1500 typically was mostly a spring package.
They could come with 14b sf, but typically came with 10b. Other than springs, they're pretty much the 1500 if they don't have the14bsf rear.
2500 "light heavy duty" gets a bit murkier as they could come with the big or small 14b. I've never heard of a 10b on a 2500.