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It don't have a fuse for the 02 sensors.
look under you Chevy and locate the catalytic converter. Your 02 sensors are located before and after the catalytic converter on your muffler. See 1 or 2?
6
4
three
One.
One.
TWO.
It has 4 and they are in the exhaust system.
It has 4 and there all screwed into the exhaust system.
2. one before the cat. converter and one after it, near tailpipe
4 and there all screwed into the exhaust system/pipes.