Howdy, I have been hearing a pulsing low level noise dependent upon speed the past month. The wife is making me crazy about fixing this before it leaves us stranded someplace. Thinking it was probably a belt separating on one of the tires I pulled all 4 tires one at a time and replaced with the spare. Did not help so now I am thinking it might be a wheel bearing. This is a 2wd truck and being my first truck I am unsure how to proceed. I can't seem to find anything on Utube or this forum relating to replacing wheel bearings on 2wd trucks. Any help here will be appreciated. Thanks in advance. BTW, the truck has 125k on it.