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!
ENVOY XL WITH 5.3L Y PIPE CONVERTER ASSEMBLY WITH 2 CONVERTERS FEDERAL EMISSIONS CONVERTER WILL WORK WITH FEDERAL AND CALIFORNIA EMISSION SYSTEMS. NOT FOR SALE OR USE ON VEHICLES REGISTERED IN THE STATES OF CA, CO, ME OR NY