2007 Buick Lucerne transmission or mechanical issue

Hi, this is Bo, an auto expert on RepairPal's Car Genius team! Sorry to hear that the Lucerne is being stubborn! Your symptoms could indicate a transmission issue, such as low transmission fluid, a worn-out torque converter, or internal transmission damage. You could check the transmission fluid to make sure it's filled properly and that it's not dark or smells burnt. The grinding sound could also suggest problems with the brakes or wheel bearings. It could be that the brakes are locked up and not allowing the car to move. I'd avoid driving it and get it towed to have a pro check it out! If you have any other questions, please call us at 877-913-1554! We'll gladly find you a certified RepairPal shop in your area!