Bad ball joints will give you that squeaking noise when you turn right to left. A broken sway bar link will give you that bumping noise when you stop and go. Also the front lower shock bolts get worn down and have some play up and down. That will also give you a bumping noise. I just went through this on my screw I replaced everything in the front end And I was still getting a bumping noise, so I replaced the shocks and new bolts from advance auto...noise is gone...drives like a new truck.