Update: Came back from 3rd Seal replacement
So I decided to get this tool ( Kent Moore J-44394 Axle Seal Protector, $10 on ebay) and go to the dealer and explained to them that after research, most likely they are damaging the seal during the installation and they need this tool.
They take it pretty nice....lol ( I didn't want to sound like a smart a**SS ) .
left the car At GM for 1 day to run it and make sure no leaks. Picked it up today and been told that they actually have this type of tool, but they use what I got them.
They did indicate that the Axel rod that slides in was not smooth, but it not likely to be the problem.
So far no leak any more (after 25 miles driving) ..... Finger crossed