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Home >> GMC >> 2005 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 174 (Engine Mechanical - 3.6L (Ly7) (2 Of 6)) >> On-Vehicle Repair Instructions - Part 1 >> Intake Manifold Replacement - Lower >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2005 Cadillac STS. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: View Of Lower Intake Manifold Gasket
    GM902883Courtesy of GENERAL MOTORS CORP.
  1. Assemble the intake manifold as necessary. Refer to Intake Manifold Assemble .
    2. IMPORTANT: Inspect and replace the lower intake manifold gasket only if the gasket is worn or damaged.
  2. Install the lower intake manifold gasket.
    3. Fig 2: View Of Lower Intake Manifold
    GM1391830Courtesy of GENERAL MOTORS CORP.
  3. Install the intake manifold. Refer to Intake Manifold Installation .
    4. Fig 3: View Of Fuel Injector Harness Electrical Connector
    GM887871Courtesy of GENERAL MOTORS CORP.
  4. Connect the fuel injector harness electrical connector.
    5. Fig 4: View Of Communicator And Intake Manifold Runner Control Solenoid Electrical Connectors
    GM945390Courtesy of GENERAL MOTORS CORP.
  5. Connect the intake manifold runner control solenoid electrical connector.
    6. Fig 5: Identifying Barometric Pressure Sensor And Electrical Connector
    GM945437Courtesy of GENERAL MOTORS CORP.
  6. Connect the barometric pressure sensor electrical connector.
  7. Connect the PCV hose from the right bank camshaft cover.
    8. Fig 6: View Of Wiring Harness Conduit
    GM1285256Courtesy of GENERAL MOTORS CORP.
  8. Install the wiring harness retainer.
    9. Fig 7: View Of Throttle Body Electrical Connector
    GM887881Courtesy of GENERAL MOTORS CORP.
    NOTE: Ensure proper engagement of the wiring harness connector. The wiring harness connector must be installed straight onto the component connector and firmly seated. Visually inspect the connector to ensure that the connector latches are engaged and locked. Any damage to the connector or wiring must be repaired. Failure to follow this procedure can lead to an intermittent electrical connection, driveability concerns, and/or wiring harness or wiring harness connector damage or failure.
  9. Connect the throttle body electrical connector.
    10. Fig 8: View Of Fuel Injector Harness Electrical Connector
    GM887871Courtesy of GENERAL MOTORS CORP.
  10. Connect the fuel injector harness electrical connector.
    11. Fig 9: Top Of Engine View
    GM1348201Courtesy of GENERAL MOTORS CORP.
  11. Connect the fuel feed pipe (1) to the fuel rail. Refer to Quick Connect Fitting(s) Service (Metal Collar) in Engine Controls - 3.6L (LY7).
  12. Connect the purge line (3) to the purge solenoid valve.
    13. Fig 10: View Of Fuel Pipe Retainer
    GM1348198Courtesy of GENERAL MOTORS CORP.
  13. Install the fuel pipe retainer.
    14. Fig 11: View Of Purge Solenoid Valve And Electrical Connector
    GM887878Courtesy of GENERAL MOTORS CORP.
  14. Connect the purge solenoid valve electrical connector.
  15. Install the brake booster hose and check valve to the brake booster.
    16. Fig 12: View Of Air Inlet Duct
    GM1305320Courtesy of GENERAL MOTORS CORP.
  16. Install the air inlet duct. Refer to Air Cleaner Intake Duct Replacement in Engine Controls - 3.6L (LY7).
  17. Install the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement .
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