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Home >> Chevrolet >> 2020 >> Express 2500 LS, 6.0L Eng VIN G >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 9 (Engine Mechanical - 2.8L (LWN) Diesel) >> Repair Instructions >> Intake Manifold Replacement >> Removal Procedure

Removal Procedure

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  1. Disconnect the battery negative cable. Battery Negative Cable Disconnection and Connection (Single Battery) , or Battery Negative Cable Disconnection and Connection (Dual Battery)
  2. Throttle Body Assembly - Remove - Throttle Body Assembly Replacement
  3. Fuel Injector Deadener - Remove - Fuel Injector Deadener Replacement
  4. Fuel Injection Fuel Feed Pipe @ Intake Manifold - Remove - Fuel Injection Fuel Feed Pipe Replacement (Fuel Injector to Fuel Rail) , or Fuel Injection Fuel Feed Pipe Replacement (Fuel Pump to Fuel Rail)
  5. GM4621857Courtesy of GENERAL MOTORS COMPANY

    Electrical Connector (1) - Disconnect

  6. Wiring Harness Retainer (2) - Remove
  7. Engine Wiring Harness Bracket Nut (3) - Remove [2x]
  8. Wiring Harness (4) - Reposition away
  9. Engine Wiring Harness Bracket(5) - Remove [2x]
  10. GM4164076Courtesy of GENERAL MOTORS COMPANY

    Wiring Harness (1) - Disconnect

  11. Vacuum Pipe (2) - Remove
  12. Exhaust Gas Recirculation Valve - Remove - Exhaust Gas Recirculation Valve Replacement
  13. NOTE:

    Only remove hoses necessary to separate the engine coolant thermostat housing from the intake manifold.

  14. Engine Coolant Thermostat Housing - Remove - Engine Coolant Thermostat Replacement (LWN)
  15. GM4164135Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Two of the Nuts (1) mount the engine coolant thermostat housing to the intake manifold and cylinder head and were removed in step 13.

    Intake Manifold Nut(1, 2) - Remove [7x]

  16. Intake Manifold (3) - Remove
  17. Intake Manifold Gasket (4) - Remove and DISCARD
  18. GM4164476Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    The intake manifold has 3 gaskets, be sure to remove and DISCARD all three gaskets.

    Remove and DISCARD the gaskets (1-3).

  19. Clean and inspect the intake manifold. Intake Manifold Cleaning and Inspection 
  20. If replacing the intake manifold, transfer all necessary parts. Intake Manifold Disassemble