06 PSD 4dr long box with 71k. Over the last few days, I've noticed a slight squeak when turning left. At first I thought it could be the breaks but they don't squeak or grind when breaking and I replaced them about a year ago and only put maybe 5k on them. I've heard the possibility of being my whelk bearing. Well today I noticed not only does it make noise when turning left, but also going over small bumps. Any ideas?

 

Best answer is investigate the issue further by jacking the truck up and check bearing play with no load. Also dig in deep and check the universal joint in the drive axle shaft.