To my eyes, the AAM1150 on my truck seems to be "leaking" where the right tube is pressed in. Chevy wants me to agree the diff is "sweating", not
leaking, and that we all know sweating is normal. Since sweating is normal, there will be no fix.

So, what is the deal, does anybody's AAM1150 sweat or leak, or is my situation unusual?

mine does, same place.