Started to misfire, surging and vibrate at 30 MPH

It sounds like you might need a tune up or have a bad spark plug-coil (common), injector or low compression to be sure which one it is please follow these videos and guides.

https://youtu.be/QTE8k06MzwQ

and

https://www.2carpros.com/articles/engine-misfires-or-runs-rough

and

https://www.2carpros.com/articles/how-to-tune-up-a-car-engine

Let us know what happens and please upload pictures or videos of the problem.

The vibration does not happen when coasting. If I slowly approach 30MPH leave off the gas (seconds) start to slowly accelerate I get the vibration and the surging and what feels like a misfiring. As more gas is give and the truck speed up the vibration is gone and the truck runs fine… If I slowly approach 30 MPH going up a small hill ..vibration start and so does the surging. More gas and stops. It sometime start a little at 40 MPH but goes away quickly ( just feels like the truck is surging or misfiring a little…)

It sounds like a missfire. I have to say, without the check engine light, it makes it difficult. Have they checked things such as the catalytic converters, crank sensor, vacuum leaks... Also, do they feel it could be the transmission? Try this. Put the truck in 2nd gear and slow down to the speed that you feel the problem. See if it still does it and let me know.

thank you for your help I followed the guides and found the # 2 spark plug was cracked all fixed!