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 MANUALSBUICK2007RENDEZVOUS V6-3.5LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSCOOLANT TEMPERATURE SENSOR/SWITCH (FOR COMPUTER)SERVICE AND REPAIR
2007 Buick Rendezvous V6-3.5L
Coolant Temperature Sensor/Switch (For Computer): Service and Repair
2007 Buick Rendezvous V6-3.5LSECTION Service and Repair
Engine Coolant Temperature Sensor Replacement
Removal Procedure
1. Drain the cooling system. Refer to Draining and Filling Cooling System (Static Fill) Draining and Filling Cooling System (Vac-N-Fill).
2. Remove the intake manifold cover.
3. Remove the air cleaner outlet duct.
4. Disconnect the fuel injector harness electrical connector from the engine coolant temperature (ECT) sensor.
5. Remove the ECT sensor.
Installation Procedure
Important: Tap out sensor mounting hole in engine head to remove any thread sealant residue. Clean any sealant residue from the old sensor and apply RTV sealant to threads if the old sensor is to be reused.
1. Apply thread sealant GM P/N 12345382 (Canadian P/N 10953489) or equivalent, to the sensor threads.
Notice: Refer to Fastener Notice.
2. Install the ECT sensor.
Tighten the sensor to 20 N.m (15 lb ft).
3. Connect the fuel injector harness electrical connector to the ECT sensor.
4. Install the air cleaner outlet duct.
5. Install the intake manifold cover.
6. Fill the cooling system. Refer to Draining and Filling Cooling System (Static Fill) Draining and Filling Cooling System (Vac-N-Fill).
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.