[oneredry]

coming upon t 1500 magic number mark and I want to be crystal clear. I seen other threads talk about this but the more I rifle through them they seem to be not concrete in information. So:

my owners manual (car picked up on 3/15) states that I need GM part number 88862624.
my dealer whom I trust and gave my vin to, gave me the similar part number but with an LS additive. which doesn't make sense because if this GM part number has the LS fluid already built into it, why would I have an extra tiny bottle for me to add?? ok so I'll question that later.
Now, on here, some of you are saying that the Part number has changed (and had a page added to the owners manual to reflect this) to the regular GM axle fluid but to add the modifier. can someone please identify what should be exactly?

Thanks with sugar on top!