A faulty Oxygen Sensor is a primary reason for Failure of a Catalytic Converter. Car Manufacturers Recommend Replacement of O2 Sensors at 60,000 miles. If you are purchasing a New Catalytic Converter be sure the Oxygen Sensors are Checked and Operating Correctly!
YUKON WITH 5.7L WITH CONVERTER BUILT IN Y PIPE CA OR NY APPROVED - CARB EXECUTIVE ORDER D193-85 PER CALIFORNIA AND NEW YORK REQUIREMENTS THE TEST GROUP SHOWN HERE MUST MATCH THE TEST GROUP OF YOUR VEHICLE. CALL FOR ASSISTANCE IF NEEDED./STRO