All the oxygen sensor listings appear to be incorrect or inconclusive for my California 2000 7.4L K3500. As far as I can tell all the sensors for my year are 4 wire narrow band heated oxygen sensors but they have different plugs. On my truck all the plugs are the same and the OEM sensors appear to be Denso 234-4103 sensors.
As long as I find a sensor that fits and the plug is the same is it OK to use?
I've attached a picture of my sensor plugs. All four are the same although listings show upstream and downstream are different or they have the slot on the wrong side.