I have a 2007 grand prix and while i'm turning and accelerating i feel what's like several bumps in the steering wheel depending on how long the turn is. I noticed if i accelerate into the turn faster i don't feel any bumps. it also seems to be worse when turning left than right. And just the past few days i now hear a kind of a squeak when i slightly turn the wheel to the left. I have checked the power steering fluid and it's full. The car does not seem to be effected any other way than the noises. If anyone could assist me in a diagnoses I would greatly appreciate it. Thank You