I have a 2008 AWD 3.6 DI CTS, that I took in for an oil change and was notified that oil was leaking from the timing chain cover. It was very minor so I didn't get it fixed then but decided to take it back in a week later so no bigger issues pop up. I've been quoted at 1600.00 to fix the leak, I asked service if they are able to check the timing chain while that is being done. He said yes and that if there is any damage to the chain it would be much cheaper to repair since they will already have the engine out. I was thinking to myself after the fact that if there was damage wouldn't it be covered under the special warranty extension of 12 years 120,000 miles on the timing chain? I have 95k miles but my powertrain is up due to it being over the five year mark. I bought the car used back in 2010 and I'm not sure what all service work has been done on it, is there anyway to check and see if its had any timing issues before? Any feedback is greatly appreciate and thanks in advance.