CTS V6-3.2L VIN N (2003)
2. Disconnect the Heated oxygen sensor at the sensor pigtail.
3. Remove the heated oxygen sensor if replacement is necessary.
4. Remove the nuts securing the exhaust pipe to the left catalytic converter.
5. Remove the nuts securing the exhaust pipe to the right catalytic converter.
Notice:
Refer to Flex Decoupler Notice in Service Precautions.
See: Powertrain Management/Emission Control Systems/Service Precautions/Vehicle Damage Warnings/Flex Decoupler Notice
6. Position the exhaust system rearward, enough to allow the studs located in the rear of the catalytic converters to clear the exhaust pipe flange.
Allow the exhaust system to rest on the floor panel tunnel brace.
7. Remove the left side catalytic converter seal. Do not reuse the seal.
8. Remove the right side catalytic converter gasket. Do not reuse the gasket.
9. Remove the 2 nuts attaching the catalytic converter to the catalytic converter hanger bracket.
10. Remove the 3 nuts attaching the catalytic converter to the exhaust manifold.
