Just bought a '10 CTS 3.0 base from a dealer, super clean, got a great deal. Ended up getting the base over the premium trim package because of the sunroof leak issue, and living in Florida, I'd rather just not deal with it. Have a little extra cash to play around with and was wondering if there's any recommended maintenance I should look into for this car. 93K miles, pristine interior/exterior. Only issues seem to be a slight vibration when idling and a dead tire pressure sensor on the driver's side rear tire.