2000 5.3/4l60e swap to 2007 6.0/4l80e

[RedHeartbeat]

conversion box allows you to use your old wiring harness and PCM, easiest of all to do unless you're really good at reading schematics and can wire the Gen4 stuff into your Gen3 truck. You'll have to get the VATS disabled in the PCM for it to run most likely. If you do use the Gen3 stuff you will have to get a tune anyway to get the 80e overlay put into it or to get a 2500/80e tune loaded into it to shift the 80e.

[JoshB]

I assumed that there would be some rewiring. I guess I just need to print out the 2 schematics and lay them side by side. I have a 84 chevy truck with a tpi setup and made my own wiring harness for that. So I'm not new to the rewiring game. It also has a twin turbo setup and I did ALL the fab work on that. So I'm hoping this swap will be a breeze.
I am planning to get the HP tuner program and turbo it later. So if there was a VATS issue I could take care of that. But I would like to have the 6.0 (stock) in the truck and all the bugs worked out from the swap before I turbo it. And the tuner program is a nice chunk of change so I would like to wait on that. Wont the factory VATS in my 2000 talk to the VATS in the factory 07 computer. I know I would find out if I just looked, but I figured I would ask for anyone else reading the thread that doesn't have access to that info.

[Frenchy]

Why do extra work? Just get the conversion box. And that way if for whatever reason you need to replace the harness you don't need to build a whole custom harness again. If you plan on DDing the truck you gotta think about when stuff breaks, cuz it always does, can you afford for it to be down?

[keniff]

the conversion box is only 275.00 shipped. i put a gen IV 5.3 in my 94.

[JoshB]

So I wont have to change anything on my 5.3 harness. all I need to do is get the conversion box and reprogram the 5.3 computer for the 6.0? oh yeah, and all the mounting mods. sounds a little to easy. what about all the other sensors on the 07 6.0? are they going to talk to my 00 5.3 computer? I know the 2007 is fly- by-wire.