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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 418 (Engine Mechanical - 4.2L 6-Cylinder (On-Vehicle)) >> Repair Instructions >> Intake Manifold Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2002 Oldsmobile Bravada, 2002 GMC Envoy XL, 2002 GMC Envoy, and 2002 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the throttle body. Refer to THROTTLE BODY in Engine Controls.
  2. Remove the PCM. Refer to POWERTRAIN CONTROL MODULE in Engine Controls-4.2L
  3. Disconnect all harnesses from the engine harness bracket.
    4. Fig 1: Disconnect All Harnesses From Engine Harness Bracket
    G01706237Courtesy of GENERAL MOTORS CORP.
  4. Remove the front differential vent hose from the bracket clip.
  5. Remove the engine harness bracket bolt and remove the bracket.
    6. Fig 2: Removing Engine Harness Bracket
    G01706238Courtesy of GENERAL MOTORS CORP.
  6. Disconnect the MAP sensor electrical connector.
  7. Disconnect the crankcase ventilation hose.
    8. Fig 3: Disconnecting Crankcase Ventilation Hose
    G01706239Courtesy of GENERAL MOTORS CORP.
  8. Disconnect the brake hose at the booster.
  9. Remove the generator. Refer to GENERATOR in Electrical.
  10. Loosen and remove the intake manifold bolts.
  11. Remove the intake manifold.
    12. Fig 4: Removing Intake Manifold
    G01706240Courtesy of GENERAL MOTORS CORP.
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