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02 SENSOR 2002 CHEVY SILVERADO 5.3L. a] How many 02 sensors are there? b] Where are they located? c] Are they easily accessible?

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For a lot of engines (as long as they are not inlines), have 2. One just after where the exhaust manifold pipes meet up with the collector tubes. there is usually 3, one in each cylinder bank upstream from the cat and one after the cat if there is two cats, like the 96 and up full size V8, there are 4 total sensors

Posted on Jan 15, 2009

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