My first venture into serious modding...or at least what I call "serious". This baby got some cosmetic mods first:

Nerf bars
brush guard
four 6" KC spotlighters
tail light guards
bed liner
and of course, my famous D'OH sticker (the only bumper sticker I ever saw worthy of application).

Then came the big-boy mods. I added a Fabtech 6" suspension lift and Super Swamper TrXus Mud Terrains - 35x12.5x16.5. Then I put a cold air intake on it, a banks 4" high output exhaust system, and the creme de la creme...a hypertech reprogrammer. Adding all of this to the already 300 HP Duramax engine pushed her well over 400 HP, my mechanic estimated 430.

But the proof is in the pudding. I took her to the drags, completely equipped with 35" shoes and she ran a 15.7 second 1/4 mile, beating a 95 lighting. S-W-E-E-T!