you have 2 they are in exhaust head pipes are stainless steel
Replace
YES there the same.
What year,what motor?? it is a 2002 Chevy avalanche 1500
Yes.Yes.
r134a.
There are multiple O2 sensors on a 2002 Chevy truck. They are all located on the exhaust system. There will be pre catalytic converter and post catalytic converter sensors.
Check the auto parts websites for a 2002 Chevy pickup. There should be a picture of the individual parts.
At the bottom of the engine.
6 quarts with filter
I had that issue with my 2002 @ 45k it turned out to be the catalitic converter (if that's how you spell it)
Yes
A/C delco