Have a vibration in my gmc sierra 3500 that I don't seem to be able to find it any ideas
Wiggle on the U-Joints on the drive shaft. They should be tight with no play. Wheel balance, inspect motor mounts, transmission mounts
All so if your,s has the split shaft,lot,s of time,s it is hanger bearing bad.
Search GMC Sierra 3500 Questions
GMC Sierra 3500 Experts