Sierra 1500 4WD V8-4.8L VIN V (2004)
Catalytic Converter: Service and Repair
Catalytic Converter Replacement (4.3L, 4.8L, and 5.3L Engines)
Removal Procedure
1. Raise and suitably support the vehicle.
2. If equipped, unclip the oxygen sensor connection from the floor reinforcement.
3. Disconnect the oxygen sensor electrical connector.
4. Remove the oxygen sensor clips from the frame.
5. Disconnect the connector position assurance (CPA) retainers.
6. Disconnect the oxygen sensor electrical connectors.
7. Unclip the oxygen sensors electrical connectors from the following:
^
Hose clip
^
Transmission crossmember
8. Disconnect the CPA retainers.
9. Disconnect the oxygen sensor electrical connectors (1, 2).
