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Removal Procedure

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2007 GMC Yukon XL, 2007 GMC Yukon, 2007 Chevrolet Tahoe, 2007 Chevrolet Suburban, and 2007 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: View Of Oil Pan Skid Plate & Bolts
    GM1698083Courtesy of GENERAL MOTORS CORP.
  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
  2. Loosen the 2 rear oil pan skid plate bolts, remove the 2 front oil pad skid plate bolts and skid plate, if equipped.
  3. Remove the muffler. Refer to Muffler Replacement (1500 - w/RPO L92)  or Muffler Replacement (1500 - w/RPOs LC9/LMG/LY5/L76)  or Muffler Replacement (1500 - w/RPOs LMG/LY2/LY5)  or Muffler Replacement (2500) .
  4. Remove the transmission crossmember. Refer to Crossmember Replacement - Transmission (C1500 Series) or Crossmember Replacement - Transmission (C2500 Series) or Crossmember Replacement - Transmission (K1500 Series) or Crossmember Replacement - Transmission (K2500 series) .
    5. Fig 2: View Of Engine Wiring Harness Electrical Connectors, (CPA) Retainers & Engine Harness Clip
    GM1704011Courtesy of GENERAL MOTORS CORP.
  5. Remove the right front connector position assurance (CPA) retainer (5).
  6. Disconnect the right front heated oxygen sensor (HO2S) electrical connector from the engine wiring harness electrical connector (1).
  7. Remove the right rear CPA retainer (3).
  8. Disconnect the engine wiring harness electrical connector (2) from the right rear HO2S electrical connector.
  9. Remove the right rear HO2S electrical connector clip from the engine harness clip (4).
    10. Fig 3: View Of Exhaust Seal, Exhaust Manifold Nuts & Catalytic Converter Hanger
    GM1708728Courtesy of GENERAL MOTORS CORP.
  10. Remove the catalytic converter to exhaust manifold nuts (2).
  11. Separate the catalytic converter from the exhaust manifold studs.
  12. Slide the catalytic converter hanger (3) out from the hanger bracket.
  13. If replacing the catalytic converter perform the following steps, otherwise proceed to step 4 in the installation procedure.
  14. Remove the exhaust seal (1) as required.
    15. Fig 4: View Of Catalytic Converter Assembly HO2S's
    GM1704012Courtesy of GENERAL MOTORS CORP.
  15. Remove the HO2S's (2 and 3).
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