Engine swap 2005 to a 2004

[eds56]

hello,
would anyone be able to tell me if I can swap an entire 2004 5.3 setup into my 2005 TB EXT 5.3?
I have a complete 2004 EXT donor vehicle(engine, trans, computer, harness, and everything) available, and would like to get rid of the DoD set up on mine. 05 engine just lost oil pressure and I would do this swap if its feasible.

 

[Sparky]

I can't think of a reason why it wouldn't just bolt right up. May have to get the computer tuned for some specifics to your vehicle.

 

[eds56]

I'm sure the hardware is the same but I did't know if just swapping in the 04 computer would do the trick.
Thanks for the response.

 

[Sparky]

I have no first hand experience honestly, but since you have everything from the donor and both vehicles even came with that engine you should be just fine.

 

[eds56]

I'll just check the schematics for both and make sure the pinouts on the computers are similar. I know the DoD has additional wiring.
Thanks.

 

[Mooseman]

05 is the first year for DoD and returnless fuel system so it's not a direct swap. You could get DoD tuned out but I don't know if the 05 PCM will like the 04 non-DoD cam and injectors even if it's disabled. You would have to swap the fuel lines and pump to the return type system.

Another option that might work would be to swap the intake and fuel injector from the 05 onto the 04 engine and have the DoD tuned out. Again, the 04 cam might be a problem so the cam specs should be checked. There might be some other unforeseen issues and I don't know if it will physically bolt on.

A third option is to use the 04 PCM and harness in the 05 body. There you might have to also swap the BCM and complete truck wiring. This is just speculation because of the differences in engines and PCM's.

It's doable, just a matter of the complexity.

 

[Sparky]

Dang, I forgot about the fuel system change.

 

[eds56]

Just kidding! I understand all that you said moose! I will do some more research! Thanks for the input.

 

[Mooseman]

Better a deer than a moose in the headlights! Good luck.

 

[eds56]

Very true. I will watch out for you.
Thanks.

 

[Mooseman]

If you do it, it would be good if you could post a write up or something. Would be interesting.

 

[eds56]

Will do.

 

[98sierra5.3]

Has anyone put a 5.3 into an older gm truck like the 98 Sierra looking for some insight