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First soak it with penetrating oil and let it set for a bit. Later disconnect the connector and then unscrew it. They make kits for these, but I have always been able to just use a wrench on them. Just make sure on the new that you DO NOT touch the tip or get anything on them. This can cause adverse readings. I hope the helps you. Of yeah, some of them are really cranked on there. Just get a good coating of PB blaster or equiv. on it and let it set.

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17y ago
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Q: How do you replace O2 sensor on 1996 Chevy Blazer?
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