dont do it
if this is something like on of those resistor type chips....like off of ebay for real cheap......do not use it, as you may actually get a cel, but it will do absolutely nothing for your truck. i hate to be the bearer of bad news, but its true!I have a '06 rc 4 cyl 2wd. I purchased, for the price of a six pack, a computer chip that plugs into the ATI.
The maker claims I will increase my HP by 15 and MPG by 5 -10. Looking at the instructions it appears easy. The only claimed downfall is that the "Check Engine" light MAY come on and than go OFF "in a few days".
As many things in life, "If it seems too good to be true it most likely is."
I have not installed it. Does anyone have any experience with something like this?