50chevy

iTrader: (2)

I have a 2001 5.3 engine and the stock o2 sensors are GM part #1256943, but I have a new set of #12533817 rear o2 sensors. I can change the plug on the end od the sensor, but can they interchange and run correctly? I know some of the ls1 front/rear o2 sensors interchange easily.

martinsw

iTrader: (3)

ttt - Interested in this area - using O2's from f-body and vettes - besides connection differences, do the O2's themselves work differently?