What could cause a 2006 Chevy Malibu to vibrate in park?

* Engine mount problems. Engine mounts are designed to absorb vibrations from the engine and keep them from being transferred to the rest of the vehicle. If an engine mount is worn out or damaged, it can cause the engine to vibrate excessively, especially when the vehicle is in park.

* Transmission problems. Transmission problems, such as a slipping torque converter or a bad transmission mount, can also cause the vehicle to vibrate in park.

* Driveline problems. Driveline problems, such as a bad driveshaft or a worn-out U-joint, can also cause the vehicle to vibrate in park.

* Vacuum leak. A vacuum leak can cause the engine to run rough and vibrate, which can be felt in the park.

* Loose or damaged components. Loose or damaged components, such as a fan shroud or exhaust pipe, can vibrate against other parts of the vehicle and cause the whole thing to shake.