I'm going to wager a guess here that it is a hub bearing. Go out to a big parking lot and try this while turning left then turning right.... My guess is that it will make noise going one way and not the other... or it will change sides, in which case both hub bearings are bad. on 05+ trucks 70K miles is doin pretty good for factory bearings.
2001 QCLB 3500 Dually 4X4, Stock, FOR SALE 8000 OBO
2003 QCLB 2500 640 HP / 1125 ft/lbs SOLD!
Friends don't let friends buy VP trucks....
Parts for sale Van Aken SmartBox, Stage II Monster Pump, Twins, and FASS 95, 03-05 Banks 6Gun, TST PMCR w/R37 remote also have another full one w/R49. Parting out 08 3500. http://www.cumminsforum.com/forum/07...-part-out.html