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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 909 (Engine Exhaust System) >> Repair Instructions >> Exhaust Manifold Replacement - Left >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2003 GMC Sonoma, 2003 GMC Jimmy, 2003 Chevrolet S10 Pickup, and 2003 Chevrolet Blazer. However, it is still accessible from the selected car via links, so may be relevant.
  1. Disconnect the breather tube at the air cleaner outlet duct.
    Fig 1: Disconnecting Breather Tube At Air Cleaner Outlet Duct
    G01979390Courtesy of GENERAL MOTORS CORP.
  2. Remove the air cleaner outlet duct retaining wingnut.
    Fig 2: Removing Air Cleaner Outlet Duct Retaining Wingnut
    G01979391Courtesy of GENERAL MOTORS CORP.
  3. Disconnect the IAT sensor harness connector.
    Fig 3: Disconnecting IAT Sensor Harness Connector
    G01979392Courtesy of GENERAL MOTORS CORP.
  4. Remove the air cleaner outlet duct from the throttle body.
    Fig 4: Removing Air Cleaner Outlet Duct From Throttle Body
    G01979393Courtesy of GENERAL MOTORS CORP.
  5. Remove the intermediate steering shaft. Refer to INTERMEDIATE STEERING SHAFT REPLACEMENT - LOW in Steering Wheel and Column.
  6. Disconnect the engine coolant temperature (ECT) sensor electrical connector.
    Fig 5: Disconnecting Engine Coolant Temperature (ECT) Sensor Electrical Connector
    G01979394Courtesy of GENERAL MOTORS CORP.
  7. Remove the radiator inlet hose support bracket and nut.
  8. Raise the vehicle. Refer to JACKING AND LIFTING in General Information.
  9. Disconnect the exhaust pipe from the exhaust manifold. Refer to Exhaust Manifold Pipe Replacement  .
  10. Lower vehicle.
  11. Remove the front tire to gain access to the rear exhaust manifold bolts. Refer to TIRE AND WHEEL REMOVAL AND INSTALLATION in Tires and Wheels.
    Fig 6: Removing Radiator Inlet Hose Support Bracket And Nut
    G01979395Courtesy of GENERAL MOTORS CORP.
  12. Remove the fender wheelhouse extension.
  13. Working through the wheel house opening disconnect the spark plug wires from the spark plugs.
    1. 13.1. Rotate the spark plug wire boot one half turn.
    2. 13.2. Pull outward on the spark plug wire boot to release from the spark plug.
      Fig 7: Removing Fender Wheelhouse Extension
      G01979396Courtesy of GENERAL MOTORS CORP.
  14. Remove the exhaust manifold bolts and the stud.
  15. Lower the vehicle.
  16. From under the hood remove the exhaust manifold and the spark plug wire shields from the engine.
    Fig 8: Removing Exhaust Manifold Bolts And Stud
    G01979397Courtesy of GENERAL MOTORS CORP.
  17. Remove and discard the exhaust manifold gaskets.
  18. Clean all gasket surfaces. Refer to EXHAUST MANIFOLD CLEANING AND INSPECTION in Engine Mechanical - 4.3L Unit Repair.
    Fig 9: Removing And Discard Exhaust Manifold Gaskets
    G01979398Courtesy of GENERAL MOTORS CORP.
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