Got a screaming deal on an open box, unused SF3 3015 tuner, so I decided to give it a shot. Truck is a completely different animal. Shifts much nicer, has better around town stop and go manners, and holds overdrive on the highway all the time. Just the preloaded 91 octane tune, with shift pressure increased, is all I did. With all the great reviews for Mike @ 5Star, I can't wait to get a custom tune for this truck.

 

The customs tunes will certainly make a difference. I bought a used unit and had Mike build me a economy and towing/performance tune. I've only run it in the economy for 1 tank full and have seen a 1mpg improvement. Gonna put in the towing/performance tune today and go for a ride.

 

love mine!