ok, i don't own an avalanche, but i just bought a vortec 5.3 out of an 03 avalanche with intentions of transplanting it into my 85 jeep cj-7. my question is, are there any online wiring diagrams of the 03 avalance so i can have reference to where all these wires go and what they do?

Here is on for a Alldata online sub.
http://www.alldata.com/products/diy/index.html
MT-2500