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Home >> Pontiac >> 2007 >> Grand Prix GXP >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (Engine Mechanical - 3.8L) >> Repair Instructions >> On-Vehicle Repair Instructions >> Supercharger Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different variant/trim than selected.
CAUTION: Remove the fuel tank cap and relieve the fuel system pressure before servicing the fuel system in order to reduce the risk of personal injury. After you relieve the fuel system pressure, a small amount of fuel may be released when servicing the fuel lines, the fuel injection pump, or the connections. In order to reduce the risk of personal injury, cover the fuel system components with a shop towel before disconnection. This will catch any fuel that may leak out. Place the towel in an approved container when the disconnection is complete.
NOTE: Servicing of the supercharger unit itself is limited to replacement only. No attempt should be made to disassemble the supercharger, as parts damage may result.
    Fig 1: EGR Valve Heat Shield, Nut & Bolt
    GM912661Courtesy of GENERAL MOTORS CORP.
  1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection (RPO LS4) or Battery Negative Cable Disconnection and Connection (RPOs L26/L32) in Engine Electrical.
  2. Remove the exhaust gas recirculation (EGR) valve heat shield (1), nut (2), and the bolt (3).
  3. Remove the supercharger drive belt. Refer to Drive Belt Replacement (L26)  or Drive Belt Replacement (L32) .
  4. Remove the fuel rail assembly. Refer to Fuel Rail Assembly Replacement (L26) or Fuel Rail Assembly Replacement (L32) in Engine Controls - 3.8L.
  5. Disconnect the manifold absolute pressure (MAP) and the barometric pressure (BARO) sensor electrical connectors.
  6. Disconnect the vacuum hoses from the MAP.
    7. Fig 2: Removing/Installing MAP/BARO Sensor Bracket
    GM1210601Courtesy of GENERAL MOTORS CORP.
  7. Remove the MAP and BARO sensor bracket bolts.
  8. Remove the MAP and BARO sensor bracket.
    9. Fig 3: Boost Control Solenoid
    GM910930Courtesy of GENERAL MOTORS CORP.
  9. Remove the boost control solenoid. Refer to Boost Control Solenoid Replacement in Engine Controls - 3.8L.
  10. Disconnect the vacuum lines from the following:
    • Supercharger bypass valve
    • Manifold vacuum source
  11. Disconnect the electrical connectors from the following:
    • Supercharger bypass valve
    • EGR valve
    • Evaporative emission (EVAP) purge valve
    • Mass air flow (MAF)/intake air temperature (IAT) sensor
    • Electronic throttle control (ETC)
  12. Remove the air cleaner intake duct. Refer to Air Cleaner Inlet Duct Replacement in Engine Controls - 3.8L.
    13. Fig 4: Left Side Supercharger Bolts
    GM911155Courtesy of GENERAL MOTORS CORP.
  13. Remove the left side supercharger bolts (1, 3).
    14. Fig 5: Right Side Supercharger Bolts
    GM911157Courtesy of GENERAL MOTORS CORP.
  14. Remove the right side supercharger bolts (1, 3).
  15. Remove the supercharger.
    16. Fig 6: Supercharger Gasket
    GM190548Courtesy of GENERAL MOTORS CORP.
  16. Remove the supercharger gasket.
    17. Fig 7: Supercharger O-Ring Seals
    GM190547Courtesy of GENERAL MOTORS CORP.
  17. Remove the supercharger O-ring seals.
  18. Clean the lower intake manifold-to-supercharger mating surfaces.
  19. If replacing the supercharger remove the following:
    • Throttle body
    • Positive crankcase ventilation (PCV) valve
    • Supercharger bypass valve
    • Manifold vacuum source
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