2001 Chevy Malibu My car makes a knocking sound and my stee

Noises problem
2001 Chevy Malibu 6 cyl Automatic 80000 miles

Help. My car have been making a knocking sound when I turn since I've bought it (2years ago). Not every time just every now and then and I took it to get it fix like a month after I bought it and it countied to do it! Now a few days ago It start making this knocking noise (while driving non-stop!) Like when you drive on a flat (but its not). The sound comes from the driver's front side. I got the shocks fix about 10 monthes ago (on that side) The steering wheel shakes really bad. I'm trying to figure out of its the cv joint or wheel bearing? Any ideas?