addictedtogum

Besides wheels and tires, what can cause vibrations on these trucks? I currently have 49k mi on it and right in the 60-65mph zone I have an annoying vibration. It’s almost like I hit a bump, and there is some vibration resonance that keeps going. Once its going it doesn't go away until i go above or below the 60-65mph zone. I have balanced and rotated the wheels with no luck.

SpencerPJ

I purchased Firestone Destination tires for previous vehicle, the shop went through 9 tires, and road force balanced before i got a smooth ride. Mine was 70-75 mph. Tires can cause your vibrations.

Roofis

It could be a lot of things.... tire balancing is probably the biggest culprit in most cases. The suspension components would be the next thing you can suspect: at 49k miles is would be unlikely if it was all stock with no lift, but still possible that you have some worn out bushings or shocks that are failing on you, it could even be that some nut/bolts have loosened up on ya (so that's a free and easy check). If you're feeling the truck pull to the left or to the right you might have an alignment issue (check tire wear patterns too). One other thing I can think of which has happened to 2 of my past vehicles, but still unlikely, is the motor mounts may have met their end... but you'd see that more when you're turning, at least that's when I personally noticed that particular vibration.
Does the vibration happen when only on the throttle at 60-65 mph? or does it still happen when off throttle at those speeds?