Vibration on my truck after 60 MPH!!

King pins?

 

you are either pulling heavy or need an alignment your tires or suspension need to be realigned had the same thing with my car once tires needed alignment.. it gets out of sort if you bump it good in the front ... like a pot hole or curb

 

Is it a constant vibration or vibrate for a few seconds then stop for a few then vibrate again?

 

does it happen bobtail as well as loaded with trailer?

 

You likely have a steer tire out of round or balance issue. If its worn into the tire often you have no choice but to replace them, even with good tread left.

Buying new steers? Have them balanced, on the truck of possible. Keep them aired up as hard as you can stand, and dont hit things. Get the toe checked minimal if not a full alignment. Stay away from cheap, no name rubber or you'll be right back where you started in no time atol.

 

Did they check toe-in/toe-out? If they have it set too close to zero, it'll shake the radiator cap off. A little toe-in will help.

 

Injector?

 

Measure and set suspension ride height to spec. Check drive shaft and all axle angles to be meet spec. Vibrations that change or go away on decell or accell are almost always driveline related.