Last Saturday I took my car in for an oil change at dealership where I bought it. It was GM certified so it came with free oil changes for 2 years or 30K miles. My car only has 33K in miles (bought it with 12K). When they were finished they stated that a seal in the timing chain cover was leaking and it would be cover under the powertrain warranty to fix. So today I took it in to be fixed. Just wondering if any other V6 owners had this issue? I'm glad they caught it because my powertrain warranty runs out in Feb 2014. Looking at the repair invoice (zero charge for all the work) they replaced a number of seals, changed the oil and filter again and replaced the coolant.