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!
SIERRA 2500HD WITH 6.0L PASSENGER SIDE REAR UNDER BODY CONVERTER 133 INCH WB ONLY WITH 3 INCH OUTLET PIPE ON CAT CONVERTER WILL WORK WITH FEDERAL AND CALIFORNIA EMISSION SYSTEMS. NOT FOR SALE OR USE ON VEHICLES REGISTERED IN THE STATES OF CA O