If the squeal is when you turn the steering wheel (especially when you are parking it) could be the rear differential. Our 2004 Rendezvous rd had to be replaced 3 times. Every time we have had a squealing sound associated with it. I'm not sure what year yours is, but your Buick dealer should be able to check it out for you and you may have it replaced for free if it is covered under your warranty.
You may not have enough steering fluid?
Try moving the steering wheel from side to side.
Try moving the steering wheel from side to side.
steering wheel in locked positon try moving it a little either way and the key should turn. The steering wheel has a locking device that wont let the key turn if the wheel is not free or you have the Wrong key
Kinetic Energy helps the car wheel spin...
Low steering fluid can cause a steering wheel to whine when turning. A worn steering belt can also cause a steering wheel to whine when a car is being turned.
The steering wheel was turned.
loose nuts
Tires out of balance
Failure of the power steering system.
Failure of the Power Steering system.
get a wheel alignment