Sorry to hear you're having an issue with a noise. We do like to ensure top vehicle performance, so please do take it in for a 2nd opinion if you feel there is an issue occurring. If you decide to take it back in, please send a PM with your name, contact information, VIN#, situation, current vehicle mileage, and the name of the dealer. I hope this situation is resolved quickly for you. Keep us updated and thank you for posting your concern.
Matt,
Buick Customer Assistance