The GM 25312191 Sensor is a Genuine GM Heated Oxygen Sensor designed for specific vehicle models from 1990 to 2002, including Chevrolet, GMC, and Cadillac vehicles. This sensor is a direct replacement for the original part, ensuring a perfect fit and optimal performance. Manufactured by GM, this sensor is a genuine OEM product that meets high quality standards. It is designed to accurately measure oxygen levels in the exhaust system, helping to ensure proper engine function and emissions control. Ideal for those looking to replace their existing oxygen sensor with a reliable and compatible option.