Online Wiring Diagram

Part 1 -Testing the Oxygen Sensors (GM 4.3L, 5.0L, 5.7L) Testing The Oxygen Sensors (GM 4.3L, 5.0L, 5.7L) Testing the oxygen sensor (commonly referred to as O2 sensors) on your 4.3L, 5.0L, or 5.7L GM vehicle is not that hard to do. Since oxygen sensors are not cheap and sometimes the PCM (Powertrain Control Module = Fuel Injection Computer) accuses them of being bad, when they aren't, testing them is ... innenarchitekt-duscher.de email protected] SOLVED: How many o2 sensors are on the 1997 c 1500 chevy ... New Friend: An expert that has 1 follower. Expert. 103 Answers. Re: How many o2 sensors are on the 1997 c 1500 chevy 5.7... I believe their are two upstream sensors, (above the cat) and two down stream O2 sensors, (back side of cat), but i have come across a few pick-ups that had a fifth O2 sennsor but it had three catalitic converters. 1997 chevy silverado oxygen sensor diagram