1996 swap to 2003 5.3/auto

[GasGuzzler]

Not sure. I'd have to look that one up.

[468Blazer]

As far as cost the reworked wiring $450, tune $375 and ls1 efan wiring harness think was $100.
If one had a good pin out of the wiring you could save that money yourself. Just from experience if your getting your wiring reworked make sure your wiring was in good shape and everything working prior to sending it off.

Only thing I wished I had done was had the wiring to the pcm longer to mount the pcm somewhere else but it worked out ok the way it was.

I did have the adapter to mount the 96 oil pressure sender in back of intake but some said the 03 pcm needed oil pressure for the pcm and some said it didn't. I haven't unplugged it yet to see if it makes a difference, so I just kept both sensors in.