This is also GMT-400.... which 99% of these trucks are tbi so sitting here bashing and saying how crappy it is is useless, I am sure if people wanted a 5.3 or 6L then they would ask about the swap, but most don't even know how to do the simple mods so you are getting worked up for no reason, TBI is good for what it is and what it was designed for 25 years ago.