Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSBUICK2005LESABRE LIMITED, 4T65E/M15REPAIR AND DIAGNOSISENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROLS - INTRODUCTIONREPAIR INSTRUCTIONSKNOCK SENSOR (KS) 2 REPLACEMENTREMOVAL PROCEDURE
2005 Buick LeSabre Limited, 4T65E/M15
Removal Procedure
2005 Buick LeSabre Limited, 4T65E/M15SECTION Removal Procedure
- Turn OFF the ignition switch.
- Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
- Remove the bolts from the splash shield.
- Drain the cooling system. Refer to Draining and Filling Cooling System in Engine Cooling.
- Remove the bolts (2) from the knock sensor heat shield (1) located under the freeze plug, or the block heater if equipped.
- Disconnect the electrical connector (3) from the knock sensor (4).
- Remove the knock sensor (2) from the engine block (1).
CAUTION:
Hot engine coolant may cause severe burns. Although the cooling system has been drained, coolant still remains in the engine water jacket. This coolant will drain with the removal of the knock sensor.
RENDER: 1.0x
NO RELATED
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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.