Please check fitment notes & description for accurate information. 2001-2004 Buick Century 3.1L 2002-2004 Buick Rendezvous 3.4L 2001-2004 Chevrolet Impala 3.4L 2001-2004 Chevrolet Monte Carlo 3.4L 2001-2004 Chevrolet Venture 3.4L 2001-2004 Oldsmobile Silhouette 3.4L 2001-2004 Pontiac Aztek 3.4L 2001-2003 Pontiac Grand Prix 3.1L 2001-2004 Pontiac Montana 3.4L Oxygen Sensor's Location: How do I know the O2 sensor is good or not? Check engine light on A reduction in fuel economy. .
