Joe Dukes, the 03 ramsonly used one upstream and one down stream, and usinf factory computers, 1 pcm and 1 tcm, I have evrything hooked up right according to Chris at hotwireauto and Mark at Street and Performance. Hell, I even watched the dvd I got when I bought the wiring harness from Street and Performance last night to make sure I hooked up the o2 right "Just hook up the upstream and tie the other one out of the way", thats word for word.
