K 1500 Yukon 4WD V8-5.3L VIN Z Flex Fuel (2003)
14. Remove the right exhaust manifold pipe nuts.
15. Remove the exhaust muffler nuts.
16. Remove the catalytic converter.
17. Remove the oxygen sensors if the catalytic converter is to be replaced.
Installation Procedure
Notice:
Refer to Fastener Notice in Service Precautions.
See: Powertrain Management/Service Precautions/Vehicle Damage Warnings/Fastener Notice