Originally Posted by United_727
I was showing that an '11 built on this date (at least and forward) has the holes.
Mine was built in September 2010 (don't know the exact date offhand) and it has the holes.
Production of the 11's started on June 7th of 2010, so if they make a change like this at the beginning of the next quarter, September would probably be when they started appearing.
I have absolutely no idea how GM assembles cars or implements updates though, so that is purely a guess...