johnsons_hotrods

I have a 05 chevy 4.3 truck with no motor or trans and im going to put a 5.3 in its place. i have a engine and engine wiring harness will the 5.3 engine harness work with the trucks original body harness and is 2000 to 2005 engine harness the same. The 5.3 and 4l60 is out of a 2002 Avalanche.