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HOMESERVICE MANUALSGMC1999FORWARD CONTROL 5.7 R, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 365 (ENGINE MECHANICAL - 3.8L (UNIT REPAIR))REPAIR INSTRUCTIONSSUPERCHARGER INSTALLATION
1999 GMC Forward Control 5.7 R, Automatic

Supercharger Installation

1999 GMC Forward Control 5.7 R, AutomaticSECTION Supercharger Installation
WARNING: This page is about a different car, the 2002 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
  1. Install the supercharger gasket.
    Fig 1: Supercharger Gasket
    G01764688Courtesy of GENERAL MOTORS CORP.
  2. Install the supercharger.
  3. Install the spacers, bolts, and stud to the supercharger in the proper locations.

    Tighten: 

    Tighten the stud/bolts to 23 N.m (17 lb ft) 

    Fig 2: Supercharger Spacers, Bolts, And Stud
    G01764689Courtesy of GENERAL MOTORS CORP.
  4. Install the throttle body and gasket.
  5. Install the throttle body nuts.

    Tighten: 

    Tighten the throttle body nuts to 10 N.m (89 lb in) 

    Fig 3: Throttle Body
    G01764690Courtesy of GENERAL MOTORS CORP.
  6. Install the engine wiring harness heat shield.
  7. Install the engine wiring harness heat shield bolt and nut.

    Tighten: 

    Tighten the engine wiring harness heat shield bolt and nut to 10 N.m (89 lb in) 

    Fig 4: Engine Wiring Harness Heat Shield
    G01764691Courtesy of GENERAL MOTORS CORP.
  8. Install the MAP sensor bracket.
  9. Install the MAP sensor bracket bolts.

    Tighten: 

    Tighten the MAP sensor bracket bolts to 30 N.m (22 lb ft) 

    Fig 5: MAP sensor bracket
    G01764692Courtesy of GENERAL MOTORS CORP.
  10. Install the vacuum block.
  11. Install the vacuum block bolts.

    Tighten: 

    Tighten the vacuum block bolts to 10 N.m (89 lb in) 

  12. Install the boost solenoid.
  13. Install the boost solenoid bolts.

    Tighten: 

    Tighten the boost solenoid bolts to 26 N.m (19 lb ft) 

  14. Install the regulator valve and harness bolt.
  15. Install the booster bypass.
  16. Install the booster bypass nut.

    Tighten: 

    Tighten the booster bypass nut to 10 N.m (89 lb in) 

    Fig 6: Booster Bypass
    G01764693Courtesy of GENERAL MOTORS CORP.
  17. Install the fuel rail.
  18. Install the fuel rail nuts and stud.

    Tighten: 

    Tighten the fuel rail nuts and stud to 10 N.m (89 lb in) 

    Fig 7: Fuel Rail
    G01764694Courtesy of GENERAL MOTORS CORP.
  19. Install the vacuum line to the fuel rail.
  20. Install the spark plug wires.
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.