Either one of those harnesses will work, but if you don't want to spend $50 on a harness, you can use a harness for a 2000+ geo tracker like I did. ( the scosche gm035, I got mine from wal-mart for about $10-12 dollars I believe) No codes, no problems.
but then you lose the door chimes, right?
i thought if it didnt have the chimer it could give errors?
No errors.. just no chimes. Read the sticky at the top (it applies to 05 as well).
yeah mine throws no codes.. just no chimes which i hatee anyway