Some background information, about a year or so ago when I had my lift and tires put on the shop told me that the driver side upper control arm needed replacing so I bought a new OEM one (looks just like factory) and had it installed. About 8 months later I took it in to a different shop to have the headers and new exhaust put on and told the mechanic to just do a check on the front suspension to make sure everything was tight since I was hearing noises. The sound was like a quick/sharp high-pitched squeak just from the driver side when I hit certain bumps, didn't make the sound on every bump which confused me. He told me the only thing he could find was that the driver side upper control arm was loose and he tightened it. It was fine for awhile but the sound came back eventually, I bought new tires and when the tire shop was doing an alignment and balancing them I noticed the mechanic tightening a bolt which to me appeared to be the upper control arm once again. The sound went away for hundreds of miles but just recently came back about a week ago. I got my tools out last night and tightened the upper control arm bolts and took it for a drive and although it wasn't as noticeable as before, it still made the sharp high-pitched squeak over two or three bumpers. Like my title says, this is a shot in the dark to see if anyone has had this problem or could possibly diagnose it as something besides the upper control arm. Maybe tell me about a upper control arm out there that is better than the OEM ones.