I am thinking seriously about either a programmer or chip for my truck, its a 99 3/4 4.10 gear'd 5.9 thats stock except for a K&N and I need opinions on which way to go. I want to get a little better gas mileage and am looking at this route, any help is greatly appreciated......

 

I have a super chips, tow is good and so is 91. There mps thing seem to help out a bit. I have not don the math yet but its better than it was before.