Bigdaddydrew

OK just joined up, I am working on a friend’s 03 Silverado. New sensors, seems like the harness had already been replaced so I didn’t replace it. Since the problem is both sensors and there are two wires I don’t think it’s the harness at the connector to the sensors. Checked the resistance at the connector very close to 1.0. want to.know if someone has the info for the corresponding pins on the main ecm harness, Also if anyone else has had success with going to ADCelco 213-3521 from aftermarket. Also has anyone noticed if humidity changes anything. Didn’t have an issue foe several weeks of on and off use then it rained yesterday when I was taking it for what I thought would be the last test drive and the check engine light came on. Back to the drawing board