04 Trailblazer coolant temp sensor
Need help with replacing the coolant temperature sensor. Trying to troubleshoot some items to get the service engine light off, but not sure where the sensor is located. I purchased a new one on the web, but need help with replacing it.
[ol]
Turn the engine OFF.
Caution: Refer to Battery Disconnect Caution in Cautions and Notices.
Disconnect the negative battery terminal.
Drain coolant below the level of the engine coolant temperature (ECT) sensor. Refer to Draining and Filling Cooling System .
Disconnect the ECT sensor electrical connector (1).

Carefully remove the ECT sensor (1). [/ol]
Installation Procedure
[ol]Notice:Use care when handling the coolant sensor. Damage to the coolant sensor will affect the operation of the fuel control system.
Notice:Replacement components must be the correct part number for the application. Components requiring the use of the thread locking compound, lubricants, corrosion inhibitors, or sealants are identified in the service procedure. Some replacement components may come with these coatings already applied. Do not use these coatings on components unless specified. These coatings can affect the final torque, which may affect the operation of the component. Use the correct torque specification when installing components in order to avoid damage.
If installing the original sensor or a new sensor without sealant, apply thread sealer P/N12346004 or equivalent.
Notice: Refer to Fastener Notice in Cautions and Notices.

Install the ECT sensor.
Tighten
Tighten the ECT sensor to 16N·m (12lbft).
Connect the ECT electrical connector (1).
Connect the negative battery terminal.
Refill the engine coolant. Refer to Draining and Filling Cooling System . [/ol]
Turn the engine OFF.
Caution: Refer to Battery Disconnect Caution in Cautions and Notices.
Disconnect the negative battery terminal.
Drain coolant below the level of the engine coolant temperature (ECT) sensor. Refer to Draining and Filling Cooling System .
Disconnect the ECT sensor electrical connector (1).

Carefully remove the ECT sensor (1). [/ol]
Installation Procedure
[ol]Notice:Use care when handling the coolant sensor. Damage to the coolant sensor will affect the operation of the fuel control system.
Notice:Replacement components must be the correct part number for the application. Components requiring the use of the thread locking compound, lubricants, corrosion inhibitors, or sealants are identified in the service procedure. Some replacement components may come with these coatings already applied. Do not use these coatings on components unless specified. These coatings can affect the final torque, which may affect the operation of the component. Use the correct torque specification when installing components in order to avoid damage.
If installing the original sensor or a new sensor without sealant, apply thread sealer P/N12346004 or equivalent.
Notice: Refer to Fastener Notice in Cautions and Notices.

Install the ECT sensor.
Tighten
Tighten the ECT sensor to 16N·m (12lbft).
Connect the ECT electrical connector (1).
Connect the negative battery terminal.
Refill the engine coolant. Refer to Draining and Filling Cooling System . [/ol]
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RGibson
Express, Savana & G-Series Vans
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Jan 21, 2017 11:04 AM
chevrolet, chevy, coolant, ect, engine, located, remove, replacement, sensor, system, tahoe, temp, temperature, trailblazer, troubleshoot




