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Q:

CHECK ENGINE LIGHT KEEPS COMING ON on 1999 GMC Safari

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THE CHECK ENGINE LIGHT CAME BACK ON AFTER BEING CHECKED IN LOW TEMPERTURES OF GEORGIA THIS PAST CHRISTMAS.
(2) Answers
(1) Comments
you said checked, not repaired. re seting the light only lets the problem remain and the light will come back on till you have a diag performed and repairs made to correct the issue.

Roy
Roy:
The work performed consisted of the following:

New thermostat & gasket for the water pump
New gas cap & gasket
Cleaned off sensor, which sensor , I don't know as my wife had the work done & I was not there at the time.