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Oxygen sensor

Tiny
DGREEN
  • MEMBER
  • GMC SIERRA
I have a 1997 GMC sierra with 194,000 miles on it how do you know if the O2 sensors are going bad
Friday, June 15th, 2007 AT 6:45 PM

2 Replies

Tiny
DGREEN
  • MEMBER
  • 2 POSTS
The fuel filter is located on the drivers side on the bottom of the fuel cell behind a plastic cover
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Friday, June 15th, 2007 AT 6:48 PM
Tiny
DANIMALGMC
  • MEMBER
  • 33 POSTS
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)
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Monday, June 25th, 2007 AT 10:03 AM

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