Doing a cam in my 2010 5.3 and took thre oil pump off and looked behind it and seen all the lobes/counter weight/ears.. on the crank and looked like this...
Does anyone have a crank laying around if so take some pics and let me see?!!! im pretty sure this is how the casting is but i could be wrong!

h

 

It's just the casting and tooling marks.

 

Yep...Casting marks. El-nor-mal.

 

looks good to me! Slap that cam in there and go haul ***!!

 

Nice! i figured that but again i was not 100% sure. thanks for all the help!