Key on a C6.
 

I am a new guy to this forum. Mine is a 2011 Standard Coupe. Got it about 3 to 4 weeks ago. Only 6000 + miles on it. I ordered a new #2 key fob. The originals with the car had #2 with the crack from (my guess) opening the fob to change batteries. Today I stuck the #2 key in to the rear lock and turned it clockwise (manual says clockwise). I wanted to see and it opening the truck. It did not turn, This is key 2. I did not have key 1 with me at the time. To far to go home to get key 1. Checked 2 key with a magnifier with 1 and couldn't see much difference. Any guesses to the problem? New lock time?

Found the answer today.