Sierra 3500 Denali 4WD V8-6.0L (2011)
5. Install the exhaust muffler to catalytic converter (2) with nuts (1) and tighten to 45 Nm (33 lb ft).
6. Install the transmission support crossmember. Refer to Transmission Support Crossmember Replacement (2WD 1500 Series) (See: Body and
Frame/Frame/Cross-Member/Service and Repair/Transmission Support Crossmember Replacement (2WD 1500 Series))Transmission Support
Crossmember Replacement (4WD 1500 Series) (See: Body and Frame/Frame/Cross-Member/Service and Repair/Transmission Support
Crossmember Replacement (4WD 1500 Series))Transmission Support Crossmember Replacement (2WD 2500/3500 Series) (See: Body and
Frame/Frame/Cross-Member/Service and Repair/Transmission Support Crossmember Replacement (2WD 2500/3500 Series))Transmission
Support Crossmember Replacement (4WD 2500/3500 Series) (See: Body and Frame/Frame/Cross-Member/Service and Repair/Transmission
Support Crossmember Replacement (4WD 2500/3500 Series))
7. Remove the support from the transmission.
8. Connect the HO2S sensors. Refer to the following:
*
Heated Oxygen Sensor Replacement - Bank 1 Sensor 1 (2500 Series - Cab/Chassis) (See: Computers and Control Systems/Oxygen
Sensor/Service and Repair)Heated Oxygen Sensor Replacement - Bank 1 Sensor 1 (2500 Series) (See: Computers and Control
Systems/Oxygen Sensor/Service and Repair)Heated Oxygen Sensor Replacement - Bank 1 Sensor 1 (1500 Series) (See: Computers and
Control Systems/Oxygen Sensor/Service and Repair)
*
Heated Oxygen Sensor Replacement - Bank 1 Sensor 2 (2500 Series - Cab/Chassis) (See: Computers and Control Systems/Oxygen
Sensor/Service and Repair)Heated Oxygen Sensor Replacement - Bank 1 Sensor 2 (2500 Series) (See: Computers and Control
Systems/Oxygen Sensor/Service and Repair)Heated Oxygen Sensor Replacement - Bank 1 Sensor 2 (1500 Series) (See: Computers and
Control Systems/Oxygen Sensor/Service and Repair)
*
Heated Oxygen Sensor Replacement - Bank 2 Sensor 1 (2500 Series - Cab/Chassis) (See: Computers and Control Systems/Oxygen
Sensor/Service and Repair)Heated Oxygen Sensor Replacement - Bank 2 Sensor 1 (2500 Series) (See: Computers and Control
Systems/Oxygen Sensor/Service and Repair)Heated Oxygen Sensor Replacement - Bank 2 Sensor 1 (1500 Series) (See: Computers and
Control Systems/Oxygen Sensor/Service and Repair)
*
Heated Oxygen Sensor Replacement - Bank 2 Sensor 2 (2500 Series - Cab/Chassis) (See: Computers and Control Systems/Oxygen
Sensor/Service and Repair)Heated Oxygen Sensor Replacement - Bank 2 Sensor 2 (2500 Series) (See: Computers and Control
Systems/Oxygen Sensor/Service and Repair)Heated Oxygen Sensor Replacement - Bank 2 Sensor 2 (1500 Series) (See: Computers and
Control Systems/Oxygen Sensor/Service and Repair)
9. Start the engine and check the front exhaust system for leaks.
Catalytic Converter Replacement (L96 with ZW9)
Catalytic Converter Replacement (L96 with ZW9)
Removal Procedure
Warning: Refer to Exhaust Service Warning (See: Engine, Cooling and Exhaust/Exhaust System/Service Precautions).
Warning: Refer to Hot Exhaust System Warning (See: Service Precautions/Technician Safety Information/Hot Exhaust System Warning).
1. Disconnect the heated oxygen sensor (HO2S). Refer to the following:
