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 ALL WITH 6.0L AND 8.1L FEDERAL EMISSIONS DRIVERS SIDE CONVERTER WILL WORK WITH FEDERAL EMISSION SYSTEMS. NOT FOR SALE OR USE ON VEHICLES REGISTERED IN THE STATES OF CA, CO, ME OR NY