Cm2350b

Do all the CM2350B controllers utilize the SGM or just some?

SGM is not part of the controller, it is a part of the vehicle CAN bus....

So what build dates have it?

2018+ is what everyone says, I don't deal with them often so can't say if late 2017s have them too.

Someone said late 2017 builds have it too.
I assumed the sure fire test was they used the CM2350F ECM, but that is not the case, CM2350B ECM vehicles can also have it.