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Home >> GMC >> 2003 >> Yukon Denali >> Repair and Diagnosis >> External Pages >> Different car >> Section 497 (Engine Mechanical (Repair Instructions -- 1 Of 3) -- 4.8L, 5.3L & 6.0L) >> Repair Instructions (On-Vehicle & Off-Vehicle - Part 1) >> On-Vehicle Repair Instructions >> Intake Manifold Replacement >> Removal Procedure

Removal Procedure

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    IMPORTANT: The intake manifold, throttle body, fuel rail, and injectors may be removed as an assembly. If not servicing the individual components, remove the manifold as a complete assembly.
  1. Remove the throttle body. Refer to Throttle Body Assembly Replacement in Engine Controls - 4.8L, 5.3L, and 6.0L.
  2. Remove the fuel injectors. Refer to Fuel Injector Replacement in Engine Controls - 4.8L, 5.3L, and 6.0L.
  3. Disconnect the following electrical connectors:
    • Manifold absolute pressure (MAP) sensor (1)
    • Knock sensor (2)
  4. Remove the knock sensor harness electrical connector from the intake manifold.
  5. Set the electrical harness aside.
    6. Fig 1: View Of MAP Sensor & Knock Sensor Electrical Connectors
    GM679510Courtesy of GENERAL MOTORS CORP.
  6. If equipped with vacuum assisted brakes, remove the vacuum brake booster hose from the rear of the intake manifold.
    7. Fig 2: View Of Vacuum Brake Booster Hose To Intake Manifold Rear (5.3L Engine w/RPO HP2)
    GM1236362Courtesy of GENERAL MOTORS CORP.
  7. Remove the positive crankcase ventilation (PCV) hose.
    8. Fig 3: View Of PCV Hose
    GM1201537Courtesy of GENERAL MOTORS CORP.
  8. Remove the MAP sensor (1) from the intake manifold.
    9. Fig 4: View Of MAP Sensor
    GM1201538Courtesy of GENERAL MOTORS CORP.
  9. Remove the evaporative emission (EVAP) purge solenoid vent tube by performing the following:
    1. Remove the EVAP tube end from the solenoid (1).
    2. Remove the EVAP tube end from the vapor pipe (2).
    10. Fig 5: View Of EVAP Tube To Solenoid & Vapor Pipe
    GM1285743Courtesy of GENERAL MOTORS CORP.
  10. Remove the EVAP purge solenoid bolt (2), solenoid (3), and isolator (1) from the intake manifold.
    11. Fig 6: View Of EVAP Purge Solenoid Bolt, Solenoid & Isolator
    GM389993Courtesy of GENERAL MOTORS CORP.
  11. Loosen the intake manifold bolts.
  12. Remove the intake manifold.
    13. Fig 7: View Of Intake Manifold & Bolts
    GM1201541Courtesy of GENERAL MOTORS CORP.
  13. Remove the intake manifold gaskets (1) from the intake manifold.
  14. Discard the old intake manifold gaskets.
    15. Fig 8: View Of Intake Manifold Gasket
    GM492770Courtesy of GENERAL MOTORS CORP.
  15. If required, clean and inspect the intake manifold. Refer to Intake Manifold Cleaning and Inspection .
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