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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 921 (Engine Exhaust System) >> Repair Instructions >> Exhaust Manifold Replacement - Left Side (6.6L) >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2007 GMC Sierra and 2007 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: View Of EGR Cooler Pipe Bracket Bolt
    GM1874789Courtesy of GENERAL MOTORS CORP.
  1. Drain the cooling system. Refer to Cooling System Draining and Filling (Static Fill) or Cooling System Draining and Filling (Vac-N-Fill) .
  2. Remove the charge air cooler inlet pipe. Refer to Charge Air Cooler Inlet Pipe Replacement .
  3. Remove the glow plug control module. Refer to Glow Plug Control Module Replacement .
  4. Remove the exhaust gas recirculation (EGR) cooler pipe bracket upper bolt (1).
  5. Raise and suitably support the vehicle half way. Refer to Lifting and Jacking the Vehicle .
  6. Fig 2: View Of EGR Cooler Pipe & Bolt
    GM1874790Courtesy of GENERAL MOTORS CORP.
  7. Perform the following steps working through the wheelhouse opening, remove the EGR cooler pipe lower bolt (1) at the oil cooler.
  8. Reposition the EGR cooler pipe (2) out of the way.
  9. Fig 3: View Of Exhaust Pipe To Exhaust Manifold Bolts
    GM1874787Courtesy of GENERAL MOTORS CORP.
  10. Remove the exhaust pipe to exhaust manifold bolts (1).
  11. Fig 4: View Of Exhaust Manifold Heat Shield & Bolts
    GM1874792Courtesy of GENERAL MOTORS CORP.
  12. Remove the exhaust manifold heat shield bolts (1) and shield (2).
  13. Fig 5: Left Exhaust Manifold Bolts & Nuts Removal & Installation Sequence
    GM1335939Courtesy of GENERAL MOTORS CORP.
  14. Remove the exhaust manifold bolts and nuts in the sequence shown.
  15. Remove the exhaust manifold and gasket. Discard the gasket.