[57corv]

Problem solved. I got out my trouble light and inspection mirror and located the reservoir at the back of the engine where it was hard to see. I was low on power steering fluid. After bringing it up to the correct level, everything is fine and there are no more noises. I still wonder why I got the growling noise only on left turns. The car has 115K miles and I don't think the level was ever checked before by either my father-in-law (original owner) or myself. Just thought I would pass on the experience.