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Its on the exhaust pipe just below the exhaust manifold. It will have a wire coming out of it. Cant miss it.

  • you have (4) o2 sensors 2 on each side of the exhaust,2 before the cat called bank 1..... and 2 ehind the cat called bank 1.

That year only has 2 NOT 4

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Q: Where is the O2 sensor on a 1994 Chevy Suburban 1500 350 V8 engine?
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