Product Description
Brand-new genuine GM one wire (non-heated, original equipment) Oxygen (O2) Sensor for 1984-1987 Vin 9 and Vin 7 Buick Grand National, Turbo Regal, 1987 GNX, and 1989 Turbo Trans Am.
This part supercedes both ACDelco AFS-20 and AFS-22 oxygen sensors.
This genuine GM part features pre-applied anti-seize compound on threads and will ship in its original GM packaging as shown.
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Finally have correct readings
87 gn o2 readings seemed a little off so decided to replace with new o2 sensor. Much better than before car actually idles a lot better now. Thanks for the fast shipping
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AC Delco O2 sensor works best for my "stock" application
My engine is "stock," and when I tried to use non GM O2 sensor, the engine did not run correctly and I could see unfavorable response on the Scan Master. Delco O2 sensor worked great. For that matter, I try to use only AC Delco electrical parts and sensors. Had lousy luck with non AC Delco parts.