i have a 99 silverado 5.3. i put a Granatelli MAF sensor, a throttle body spacer, duel flow pro exhust and a super chip, with 285/75/16 and i can hardly get them to spin even when i power brake it what is my next step (headers, cold air intake, injectors, coils, shift kit , or change my front and back gears) (supercharger is not an option) let me know what you think?
i want to smoke the hemi's and fords

 

You have a torque management issue, the factory programming retards the timming at wide open throttle to keep you from abusing (save money on warrany work for the dealer) the drive train, a hand held programmer will not remove this, however there are people out there that have put in the time on the dyno to get rid of this pesky little issue and also add more power better shifts and better driveability than any hand held could come close to. I had my 03 tuned by Good Guys Garage here in Kansas, they were super helpfull, answered all my questions and got me tuned for exactly what I wanted, I can kill a HEMI any day no problem, and my tow/haul button is now my race button with higher shift points higher rev limiter and no more speed limiter at all, they should be on the web now at goodguysgarage.net or the phone is 316-258-0358. I mailed my computer to them and had it back in a week ready to go. Good luck and happy hunting.