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I know there are 3 oxygen sensors. We bought a Haynes repair manual at Auto Zone and it's very helpful. A 1996 Safari with a 4.3L vortec engines has 4 sensors. 2 on the header pipes and one before the catylitic converter and one aft. You can buy a proper O2 sensor socket or use a good wrench. It depends if it is very seized or not?

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19y ago

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