2004 Buick Regal LSFACTORY OEM SERVICE PROCEDURE

Installation Procedure

    Fig 1: View Of Throttle Body Assembly
    GM12267Courtesy of GENERAL MOTORS CORP.
  1. Install the new gasket.
  2. Install the throttle body assembly.
    3. NOTE: Refer to Fastener Notice in Cautions and Notices.
  3. Install the throttle body nuts.

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

  4. Install the accelerator controls cable bracket. Refer to Accelerator Controls Cable Bracket Replacement .
    5. Fig 2: View Of Vacuum Hoses To Throttle Body
    GM180061Courtesy of GENERAL MOTORS CORP.
  5. Install the vacuum line to the throttle body.
    6. Fig 3: View Of IAC Valve Electrical Connector
    GM155466Courtesy of GENERAL MOTORS CORP.
  6. Connect the IAC valve sensor electrical connector.
    7. Fig 4: View Of MAF Sensor & Electrical Connector
    GM155464Courtesy of GENERAL MOTORS CORP.
  7. Connect the MAF sensor electrical connector.
    8. Fig 5: View Of TP Sensor & Connector
    GM178680Courtesy of GENERAL MOTORS CORP.
  8. Connect the TP sensor electrical connector.
  9. Install the air cleaner intake duct. Refer to Air Cleaner Intake Duct Replacement .
  10. Fill the cooling system. Refer toDraining and Filling Cooling System in Engine Cooling.
  11. Install the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement (L36) or Fuel Injector Sight Shield Replacement (L67) in Engine Mechanical - 3.8L.
Factory Service Tools

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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.