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.
2004 Chevrolet Impala LSFACTORY OEM SERVICE PROCEDURE
Removal Procedure
NOTE:
Use care when handling the coolant sensor. Damage to the coolant sensor will affect the operation of the fuel control system.
- Partially drain the cooling system. Refer to Draining and Filling Cooling System in Engine Cooling.
- Remove the thermostat housing. Refer to Thermostat Replacement (3.4L) or Thermostat Replacement (3.8L) in Engine Cooling.
- Disconnect the ECT sensor electrical connector.
- Remove the ECT sensor.
Factory Service Tools
Use the Manual With the Right Hardware
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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.
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