Question about 1991 Chevrolet S-10 Blazer
Could you tell me how to reset the "service engine" light, after I have changed the spark plugs?
Take the positive post off of the battery for 5 minutes, put it back on. If the light comes back on again, it's most likely either the knock sensor or the O2 sensor.
Posted on Nov 17, 2008
You will have to have a scan tool. was the light flashing ?does the truck run better?
Posted on Aug 26, 2008
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Posted on Jan 02, 2017
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