well im gonna do the ls1 swap in a few months and i want to change over my interior to the 4th gen. so i was wondering if i do that can i just take out my whole old 3rd gen interior harness and replace it with the new 4th gen. cause im getting the engine tranny and engine harness and pcm from the same car so wouldnt it make sense to use the same interior harness?
i have a 2002 donor car that im taking engine/trans/rear end/interior etc.
so if anyone can tell me if thats easier or what not cause ive looked around and i cant find anything on that. idk if im not looking hard enough or what.

 

Surf the LTx/LSx swap forum

As far as the interior wiring, I wouldnt touch it unless you plan on a 4th gen dash swap