i need some help, whenever i get on the gas pedal my truck gets to about the shift point my rpms act like i'm at the rev limiter going up and down almost like i am low or have no gas, this has happened at differant rpm's like 3000 and 7000 depending on which gear i am in

i am currently waiting for my superchips tune to go back to stock from my performance tune maybe thats the problem?

 

Return it to stock tune to eliminate the possibility of it being a bad tune. If it still does it, assume it is either the fuel filter clogged, bad fuel, or you are losing the fuel pump. That's from your short description.
Chris