99 v6 to 04 4.8 swap

Hey guys im new around here
im trying to find some info about to swap the harness I know how to work on cars but into wiring and electrical im done haha
I have a 99 gmc sierra and I want to swap this engine an a 04 4.8 out of a sierra I have everything
Motor
harness
Tac module
Pedal
And fuse box too
I haven't start with it im trying to figure out is the harness will work if I plug it with my stock fuse box or I have to move around the pins or if I can use the fuse box from the 04 and just put it in like plug and play
I just trying to do it by my self if I have to modify the harness can someone tell me a link or thread to see how to do it tl
Thanks guys