Hello, I will do my best to help answer your General Motors Vehicle questions.
Ok we need a little more information. What exactly is the problem? Are you referring to turn by spinning or turn by left and right?
Are you jacking both front tires up at the same time?
They will spin. You will notice the one your not spinning by hand will spin
the opposite way. Normal reaction of a non locking differential. It takes both wheels on the ground to activate and lock it in park.
Why are you concerned with this?
You have a bad wheel bearing/hub assembly. Now its going to be up to you to determine which one (or two) is (are) bad. All 4 corners have these
Is the noise definitely coming from the front?
If you had to point (from the drivers seat) in the vehicle where is the noise originating?
Then thats where to start. You may not feel anything when checking these, and you probably wont hear anything with the weight off the bearing.
The easiest way to tell without a chassis ear, is have someone drive you while you move around the vehicle. Place your head between the front seats and close your eyes while listening. The side/corner thats making the most noise is usually the one thats failing.
These are the same left and right so if you happen to guess wrong take the old one and put it on the opposite side.( Front and rear are different, but left and right are the same).