hypertech power programmer III

I was just wondering has anybody has this, that has a truck like mine with a 350 Vortec? I was just wondering if it is worth the money to spend for it? Also how good of performance does it really give?

I can't tell you on your truck for sure but I hooked one up to my Z-28 LS1 and wow. The extra power is fairly nice but the ability to increase the red line and shift points and firmness really helped out. Plus to be able to remove the speed limiter was kinda cool to. If you looking for performance I would do exhaust,shift kit, gears, cold air intake, and then the power programmer.

I have that exact truck. It runs smoothe as a baby. It's a gas hog but fuck you can really get up on it. I've smoked up an Integra and stuff like that with it. Problem is back tires lose traction due to so much torque

Do you have anything else done to the truck besides the programmer? Does or did it affect anything?

also do you have to use premium gas or can you just use reg. unleaded?