GM Oxygen Sensor Overview These Lambda Sensors are Original Equipment (OE) components manufactured for the General Motors (GM) group, including Chevrolet, GMC, Buick, Pontiac, Saturn, Saab, Isuzu, and Oldsmobile vehicles. The OE numbers 12570795, 12586646, 12581346, and 12578624 are closely related and frequently cross-referenced together across multiple vehicle platforms. These sensors monitor oxygen content in the exhaust gases and relay this information to the Engine