Hypertec
I have Installed a Hypertech Chip in my Tahoe and boy oh boy it woke that puppy up.
It does, alot of things like advanced auto Timing, Improves shifting,you can change your tires and set the computer to ajust your speed-O,
I have had quite a few good laugh at some of the cars/trucks I have beat with this big Tahoe.
From the red light a red Ford Lighting was next to me we both took off, I was ahead by about 2 truck lengths then at the next light he flagged me to roll down my window(my AC was On) then he said "Your Lucky I was not ready" I said are you ready....at the same time a mustang (older 5.0 type) was ready as well.
I beat them both ...Lightning by 3-4 truck lengths the mustang by 1/2.
P.S. my truck is a dog with out the "Chip".
I have also done a shift kit and pullys ...but thats it
I was going to do exaust work but its a sleeper truck with out all that exaust noise and I did not see taking off the Stainless exaust.