Damn, I'm good! <A HREF="http://www.aa1car.com/library/2005/us80530.htm" target="_blank">http://www.aa1car.com/library/2005/us80530.htm</A> Look at the last 3 paragraphs. This is for a 98 Saturn SC2. $13.49 at Autozone. I'd say it's worthwhile to skip testing and just replace it.