I now own a 04 and a half chevy 2500hd duramax. looked it completly over when i got home. no chip is visably installed to the harness like i thought there was. theres a ton of wires going every where, where there should be a chip. but none are connected there all dead end wires. theres an egt sensor in the manifold not hooked up. and a munch more wires all just laying under the hood. also theres a place where i could put a boost gauge on but no line so i may order up a boost gauge. Now for the game. the truck is no slouch. You put the hammer down and she smoke real hard in the low end. Then once it clears up she goes like hell. if i were to gues i'de say low 15's high 14 sec. 1/4's. just by feel . What the hell is still done to the truck that i can't find? A hypertech wouldn't put that much powa in it would it? its over fueling down low and seems like the trans is not stock but what do i know?