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HOMESERVICE MANUALSCHEVROLET2009TAHOE BASE, 4.8 CREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 599 (ENGINE EXHAUST SYSTEM)REPAIR INSTRUCTIONSTHREE-WAY CATALYTIC CONVERTER REPLACEMENT
2009 Chevrolet Tahoe Base, 4.8 C

Three-Way Catalytic Converter Replacement

2009 Chevrolet Tahoe Base, 4.8 CSECTION Three-Way Catalytic Converter Replacement
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2012 GMC Yukon XL, 2012 GMC Yukon, 2012 Chevrolet Tahoe, 2012 Chevrolet Suburban, and 2012 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Three-Way Catalytic Converter Components
GM2292208Courtesy of GENERAL MOTORS COMPANY
Three-Way Catalytic Converter Replacement

Callout Component Name

Preliminary Procedure

  1. Remove the engine skid plate (if equipped). Refer to Oil Pan Skid Plate Replacement (1500 with RPO NZZ) , Oil Pan Skid Plate Replacement (2500/3500 with RPO NZZ)
  2. Remove the transmission support crossmember. Refer to Transmission Support Crossmember Replacement (4WD 2500 Series) , Transmission Support Crossmember Replacement (4WD 1500 Series) , Transmission Support Crossmember Replacement (2WD 2500 Series) , Transmission Support Crossmember Replacement (2WD 1500 Series)
  3. Disconnect the oxygen sensors. Refer to Heated Oxygen Sensor Replacement - Bank 1 Sensor 1 (1500 Series) , Heated Oxygen Sensor Replacement - Bank 1 Sensor 1 (2500 Series) ,, Heated Oxygen Sensor Replacement - Bank 1 Sensor 2 (1500 Series) , Heated Oxygen Sensor Replacement - Bank 1 Sensor 2 (2500 Series) ,, Heated Oxygen Sensor Replacement - Bank 2 Sensor 1 (1500 Series) , Heated Oxygen Sensor Replacement - Bank 2 Sensor 1 (2500 Series) , and Heated Oxygen Sensor Replacement - Bank 2 Sensor 2 (1500 Series) , Heated Oxygen Sensor Replacement - Bank 2 Sensor 2 (2500 Series) .
1 Left Exhaust Manifold Nut (Qty: 3)
WARNING:

Refer to Exhaust Service Warning .

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.