Suzuki GMC Chevrolet Cadillac Common Oxygen Sensor 0258006861 12594935

0258006861 and 12594935 oxygen sensors are universal replacement parts, fits Suzuki, GMC, Chevrolet and Cadillac models such as older CTS, Cruze, and SX4. Core function is monitoring exhaust oxygen and feeding ECU to adjust air-fuel ratio for combustion efficiency. After installation, resolves high fuel consumption and weak acceleration and eliminates check engine light; if idle unstable, exhaust emits black smoke or fuel consumption increases, aging sensor is likely; replace promptly.