When my cavalier reaches speeds of 25 mph & faster it starts to make a humming noise on the front passenger side. The sound seems to go away by slightly turning from left to right to take the load off of the passenger side. The sound inside the car is the same as if you had nobby off road tires on a truck on pavement. I was wondering if it was a bad wheel bearing, if so should i replace both even if the other isn't bad yet?