I am doing my first engine swap in 20 years (plenty of sleds), I have bee reading as much as possible but some of the lingo is not familiar. My current question is fuel return as the 04 has only one line and is from my understanding regulated in the pump, should I just swap rails and injectors, or use a filter with a regulator? I can read threads all day I just dont know the search terms to get the most pertinent ones.

 

Just swap the long block.

Use the 2001 truck intake and fuel rails, that's all you have to do. The intake are the same between the them and keeping the 2001 fuel system makes everything a direct swap.

Then tune it.

 

Okay the 01 is a 5.3 tahoe, I assume its a direct swap, looks like it.

 

Yeah, all the same stuff basically.

Plop all your stuff onto the "new" to you 6.0 engine and that's pretty much it. The rest is all done with the tune. If the engine is modded in any way some other stuff may be required.

 

only thing i ran into my 5.3 swap to 6.0 was i had to reuse the 5.3's flywheel and get a new oil sensor thats located at the back of the intake manifold. everything else swaps over.

 

If going to a 6.0 swap the inj also

 

The 6.0 injectors are still the same 25lb/hr. They ran the same size across all V8's that were non flex fuel from 2000+. Excluding the big block 8.1.

 

Yes I forgot to mention I did upgrade to the 8.1l injectors. If 6.0 will be stock just a tune and maybe intake and headers you will be ok with stock injectors. If you plan to add cam bigger injectors is a must