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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1497 (Engine Mechanical - 4.2L) >> Repair Instructions >> On-Vehicle Repair Instructions >> Intake Manifold Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2003 Oldsmobile Bravada, 2003 GMC Envoy XL, 2003 GMC Envoy, and 2003 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 .
  2. Remove the PCM. Refer to POWERTRAIN CONTROL MODULE .
  3. Disconnect all harnesses from the engine harness bracket.
  4. Remove the front differential vent hose from the bracket clip.
    Fig 1: Disconnecting All Harnesses From Engine Harness Bracket
    G02128479Courtesy of GENERAL MOTORS CORP.
  5. Remove the engine harness bracket bolt and remove the bracket.
  6. Disconnect the MAP sensor electrical connector.
    Fig 2: Disconnecting MAP Sensor Electrical Connector
    G02128480Courtesy of GENERAL MOTORS CORP.
  7. Disconnect the crankcase ventilation hose.
  8. Disconnect the brake hose at the booster.
  9. Remove the generator. Refer to GENERATOR REPLACEMENT (4.2L ENGINE)  in Engine Electrical.
    Fig 3: Disconnecting Crankcase Ventilation Hose & Brake Hose
    G02128481Courtesy of GENERAL MOTORS CORP.
  10. Loosen and remove the intake manifold bolts.
  11. Remove the intake manifold.
    Fig 4: Removing Intake Manifold
    G02128482Courtesy of GENERAL MOTORS CORP.
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