5.7 vortec swap

[eran tomer]

thinking of swaping my tbi suburban to a 5.7 vortec from a yukon donor.
my truck has the 4l80e. if the donor has the 4l60e (don't know yet) does the vortec engine still fit my transmission? and do I need a different pcm and wiring for a 4l80e?

 

[Schurkey]

The ENGINE fits just fine. You'll need a Vortec-compatible fuel pump. Potentially some exhaust mods, too.

The computer tuning and maybe the wire harness are going to be different.