Dealerships are lazy unless you have gobs of money.
Check the carrier bearing. It's between the transmission and the axle along the drive shaft. This assumes you are 4x2 and not 4x4. Then check for play in all the u-joints. The OEM shocks are generally considered junk. A new set of shocks may help but you really need to identify the source of the vibration.
The passenger front seat has a tendency to oscillate on many Titans. There is a DIY fix for it but I never did it on mine.
Check the carrier bearing. It's between the transmission and the axle along the drive shaft. This assumes you are 4x2 and not 4x4. Then check for play in all the u-joints. The OEM shocks are generally considered junk. A new set of shocks may help but you really need to identify the source of the vibration.
The passenger front seat has a tendency to oscillate on many Titans. There is a DIY fix for it but I never did it on mine.