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HOMESERVICE MANUALSBUICK2005LESABRE LIMITED, 4T65E/M15REPAIR AND DIAGNOSISENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROLS - INTRODUCTIONREPAIR INSTRUCTIONSTHROTTLE BODY ASSEMBLY REPLACEMENTREMOVAL PROCEDURE
2005 Buick LeSabre Limited, 4T65E/M15

Removal Procedure

2005 Buick LeSabre Limited, 4T65E/M15SECTION Removal Procedure
  1. Remove the fuel injection sight shield. Refer to Fuel Injector Sight Shield Replacement (L36) in Engine Mechanical.
  2. Drain the radiator coolant. Refer to Draining and Filling Cooling System in Engine Cooling.
  3. Remove the air cleaner intake duct. Refer to Air Cleaner Intake Duct Replacement .
    4. Fig 1: View Of IAC Valve Electrical Connector
    GM155466Courtesy of GENERAL MOTORS CORP.
  4. Disconnect the idle air control (IAC) valve electrical connector from the IAC valve.
    5. Fig 2: Disconnecting/Reconnecting TP Sensor & Connector
    GM178680Courtesy of GENERAL MOTORS CORP.
  5. Disconnect the throttle position (TP) sensor electrical connector from the TP sensor.
    6. Fig 3: Disconnecting/Reconnecting MAF Sensor & Electrical Connector
    GM155464Courtesy of GENERAL MOTORS CORP.
  6. Disconnect the mass air flow (MAF) sensor electrical connector from the MAF sensor.
    7. Fig 4: Removing/Installing Cruise Control Cable
    GM179147Courtesy of GENERAL MOTORS CORP.
  7. Remove the cruise control cable (2) from the accelerator control bracket (4) and throttle body lever (3). Refer to Cruise Control Cable Replacement in Cruise Control.
    8. Fig 5: Removing/Installing Accelerator Control Cable At Accelerator Control Bracket & Throttle Body Lever
    GM179148Courtesy of GENERAL MOTORS CORP.
  8. Remove the accelerator control cable (2) from the accelerator control bracket and throttle body lever (3). Refer to Accelerator Controls Cable Replacement .
    9. Fig 6: Removing/Installing Electrical Wiring Harness At Accelerator Controls Bracket
    GM179374Courtesy of GENERAL MOTORS CORP.
  9. Remove the electrical harness retainer clip (1) from the accelerator control cable bracket (3) if applicable.
    10. Fig 7: Removing/Installing Vacuum Hoses At Throttle Body
    GM180061Courtesy of GENERAL MOTORS CORP.
  10. Remove the vacuum hoses from the throttle body noting location.
    11. Fig 8: Removing/Installing Throttle Body Support Bracket Bolts
    GM203920Courtesy of GENERAL MOTORS CORP.
  11. Remove the throttle body support bracket.
    12. Fig 9: Removing/Installing Throttle Body
    GM203948Courtesy of GENERAL MOTORS CORP.
  12. Remove the 3 nuts and studs holding the throttle body to the intake manifold.
  13. Remove the throttle body assembly from the intake manifold.
    14. NOTE: Do not use solvent of any type when cleaning the gasket surfaces on the intake manifold and the throttle body assembly, as damage to the gasket surfaces and throttle body assembly may result.
    Use care in cleaning the gasket surfaces on the intake manifold and the throttle body assembly, as sharp tools may damage the gasket surfaces.
  14. Clean the gasket surface on the intake manifold and the throttle body assembly.
    15. Fig 10: Removing/Installing Accelerator Controls Cable Bracket
    GM12246Courtesy of GENERAL MOTORS CORP.
  15. Remove the accelerator controls cable bracket from the throttle body if the throttle body is being replaced.
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.