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Home >> Buick >> 2007 >> Lucerne CX >> Repair and Diagnosis >> External Pages >> Different car >> Section 203 (Engine Mechanical - 3.5L) >> Repair Instructions >> On-Vehicle Repair Instructions >> Intake Manifold Replacement - Upper >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2006 Pontiac Montana SV6, 2006 Chevrolet Uplander, and 2006 Buick Terraza. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: View Of Vacuum Hoses
    GM909586Courtesy of GENERAL MOTORS CORP.
  1. Disconnect the negative battery cable. Refer to BATTERY NEGATIVE CABLE DISCONNECT/CONNECT PROCEDURE .
  2. Remove the vacuum hoses from the following:
    • Evaporative emissions (EVAP) canister purge valve
    • Brake booster
  3. Disconnect the electrical connectors from the following:
    • Exhaust gas recirculation (EGR) valve
    • Mass air flow (MAF) sensor
    • Electronic throttle control
    • EVAP canister purge valve
  4. Remove the air cleaner intake duct. Refer to Air Cleaner Intake Duct Replacement .
  5. Drain the cooling system. Refer to Draining and Filling Cooling System (Static Fill) or Draining and Filling Cooling System (Vac-N-Fill) .
  6. Remove the left side spark plug wires from the spark plugs. Refer to Spark Plug Wire Replacement .
  7. Remove the following wiring harnesses from the retainers:
    • Camshaft position (CMP) sensor wiring harness
    • Left side spark plug wire harness
    • Engine wiring harness
    8. Fig 2: View Of Upper Intake Manifold Bolts And Stud
    GM1239040Courtesy of GENERAL MOTORS CORP.
  8. Remove the ignition coil bracket with the coils. Refer to Ignition Control Module Replacement .
  9. Remove the EVAP canister purge solenoid valve. Refer to Evaporative Emission (EVAP) Canister Purge Solenoid Valve Replacement .
  10. Remove the manifold absolute pressure (MAP) sensor and the bracket. Refer to Manifold Absolute Pressure (MAP) Sensor Replacement .
  11. Remove the EGR valve. Refer to Exhaust Gas Recirculation (EGR) Valve Replacement .
  12. Remove the upper intake manifold bolts and the stud.
  13. Remove the generator bracket.
  14. Remove the upper intake manifold.
  15. Remove the upper intake manifold gaskets.
    16. Fig 3: View Of Throttle Body
    GM1239002Courtesy of GENERAL MOTORS CORP.
  16. If replacing the upper intake manifold, remove the throttle body. Refer to Throttle Body Assembly Replacement .
  17. Clean the upper intake gasket mating surfaces.
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