oxygen sensor

GMC SIERRA
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DGREEN
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I have a 1997 GMC sierra with 194,000 miles on it how do you know if the O2 sensors are going bad
Jun 15, 2007 at 11:45 AM
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DGREEN
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the fuel filter is located on the drivers side on the bottom of the fuel cell behind a plastic cover
Jun 15, 2007 at 11:48 AM
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DANIMALGMC
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The vehicle will not run correctly with a bad O2 sensor (usually black smoke, poor mileage).
The engine light should also come on.

(1997 GMC Sierra 98000)
Jun 25, 2007 at 3:03 AM
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