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#1 |
Registered User
Join Date: Jan 2003
Location: Star Prairie WI
Posts: 392
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How do I know when its time to replace my O2 sensor? I have an '89 GMC Sierra Z71 w/ the 350 but my engine is out of a '68(or around that year). I have heard that a bad sensor can hurt gas mileage, is this true? Any other info on them would be greatly appreciated. TIA, DK
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