Repair Instructions
WARNING: This page is about a different car, the 2019 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.
Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair Verification
After any repair, perform DTC P0420 Circuit/System Verification, to verify the performance of the component:Catalytic Converter - Refer to:DTC P0420