How to replace the O2 sensor?

1999 CHEVROLET S-10
175,000 MILES • 4.3L • V6 • 4WD • MANUAL
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SHELBIEATWOOD77
O2 sensor replacement.
Mar 24, 2025 at 11:56 AM
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STRAILER
  • ASE Certified Mechanic
  • 54,503 POSTS
  • ASE Certified Mechanic
Hello Shelbie,

Here is a guide to walk you through the steps and the locations of the oxygen sensors so you can see which oxygen sensor to replace, do you have a code number by chance, if so, I can tell you which one is not working.

https://www.2carpros.com/articles/how-to-replace-an-oxygen-sensor

Check out the images (below). Please let us know what happens.
Mar 25, 2025 at 2:53 PM
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