Engine swap

[Chris Yarbrough]

Can I make a 2004 5.3l with complete harness work in a 2007.5 4.8l Silverado and it work? The motor is in I've already swapped over all accessories it won't crank obviously. I know it's timed different so I was wanting to try the harness swap.

Edited September 26, 2022 by Chris Yarbrough

[CamGTP]

Nope.

 

Nothing about a P59 controller will talk with anything on truck using a E38 with CANBUS.

 

 

The best you could do would be to make the P59 a standalone computer, have zero gauges inside the truck, no abs/traction control, likely no airbags either because it will have no idea what is going on. Plus you'd have to unlock the P59 controller to make it work without the security system and figure out how to operate the newer transmission.

 

Yank it the engine, sell it and get the correct 2007.5+ GEN 4 5.3 engine if you want a smooth swap parts wise. It will need tuning no matter what because of the AFM system on the 5.3.

[Chris Yarbrough]

Ok Thanks for the reply I suppose that's the only option.