1999 Pontiac Bonneville Car makes a clicking noise when tur

SOMETIMES, with the wheel off the ground you can shake the tire in and out and detect a little "slop" in a wheel bearing that is starting to wear. BUT, this isn't 100%. I wouldn't want you to rush right out and have a bearing changed that apears a little loose and still have the noise. The choice is yours.

It "shouldn't" affect the alignment, but if you're going to have a bearing changed, I would do that before the alignment. In addition; in my shop to test for a bad bearing on the front of a GM. We used to lift one wheel at a time and with the engine running in drive, spin the lifted wheel under power. In doing this the wheel will actually twice as fast as it would going down the road. Using this process, we could listen to each side seperately. FOR OBVIOUS REASONS, this has to be done carefully. You don't want to be pulling the car back into the garage after it's gone through the back wall and is sitting in the backyard.