Blazer 2WD V6-4.3L VIN X (2004)
Coolant Temperature Sensor/Switch (For Computer): Service and Repair
ENGINE COOLANT TEMPERATURE (ECT) SENSOR REPLACEMENT
REMOVAL PROCEDURE
NOTE: Use care when handling the coolant sensor. Damage to the coolant sensor will affect the operation of the fuel control system.
1. Turn OFF the ignition.
2. Loosen the wing nuts on the air cleaner cover and air cleaner outlet duct.
3. Move the air intake assembly aside.
4. Drain the cooling system below the level of the engine coolant temperature (ECT) sensor.
5. Disconnect the ECT sensor harness connector.