How to replace the Coolant Temperature Sensor on GMC Sierra 3500?

Before you replace the Engine Coolant Temperature (ECT) Sensor you need to lower the cooling system below the sensor level. Before removing the ECT sensor disconnect its electrical connector and unmount it from around the oil fill tube bracket. Apply GM P/N 12346004 (Canadian P/N 10953480) or its equivalent sealant to the sensor threads when reinstalling original equipment. Tighten the ECT sensor to a torque force of 50 N.m (37 lb ft) during installation. Install the electrical connector for the ECT sensor to the oil fill tube bracket then seal the ECT sensor electrical connector to its appropriate spot. Finally, refill the cooling system.

OEM GMC Sierra 3500 Coolant Temperature Sensor

Coolant Water Temperature Sensor

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GMC Sierra 3500 Coolant Temperature Sensor Part Number: 15326386
$24.96 MSRP: $46.88
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Product Specifications
- Other Name: Sensor, Engine Coolant Temperature; Air Charge Temperature Sensor; Intake Air Temperature Sensor.; Temperature Sensor; Manifold Pressure Sensor; Oil Pressure Unit; Fan Switch; Other Sensors
- Replaces: 12146312, 25036979
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2001-2006 GMC Sierra 3500 | Base, SL, SLE, SLT, WT | 8 Cyl 6.6 L DIESEL
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GMC Sierra 3500 Coolant Temperature Sensor, Black Part Number: 12608814
$30.66 MSRP: $57.58
You Save: $26.92 (47%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Sensor Assembly-Engine Coolant Temperature *Ite Or Black; Engine Coolant Temperature Sensor; Temperature Sensor; Temperature Sending Unit; Coolant Temperature Sensor; Engine Oil Pressure/Temperature Sensor; Computer Control Sensors
- Replaces: 15369305, 25037062, 12191170, 15326388
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2001-2006 GMC Sierra 3500 | Base, SL, SLE, SLT, WT | 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L GAS
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GMC Sierra 3500 Coolant Temperature Sensor Part Number: 12572027
$40.56 MSRP: $82.39
You Save: $41.83 (51%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Sensor, Computer Control Sensors; Temperature Sending Unit; Sensor, Coolant Temperature (Engine Unit)
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2003-2006 GMC Sierra 3500 | Base, SL, SLE, SLT, WT | 8 Cyl 8.1 L GAS
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GMC Sierra 3500 Coolant Temperature Sensor Part Number: 12554944
$205.54 MSRP: $417.47
You Save: $211.93 (51%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Sensor Assembly-Engine Coolant Temperature (W/ Engine Coolant T; Engine Coolant Temperature Sensor; Temperature Sending Unit; Sensor; Sensor, Coolant Temperature (Engine Unit); Sensor, Computer Control Sensors
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2001-2002 GMC Sierra 3500 | Base, SL, SLE, SLT | 8 Cyl 8.1 L GAS

GMC Sierra 3500 Coolant Temperature Sensor

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GMC Sierra 3500 Coolant Temperature Sensor Parts Questions & Experts Answers

Coolant Temperature Sensor, Black
12608814
Q: How to replace the Coolant Temperature Sensor on GMC Sierra 3500?
A:
Before you replace the Engine Coolant Temperature (ECT) Sensor you need to lower the cooling system below the sensor level. Before removing the ECT sensor disconnect its electrical connector and unmount it from around the oil fill tube bracket. Apply GM P/N 12346004 (Canadian P/N 10953480) or its equivalent sealant to the sensor threads when reinstalling original equipment. Tighten the ECT sensor to a torque force of 50 N.m (37 lb ft) during installation. Install the electrical connector for the ECT sensor to the oil fill tube bracket then seal the ECT sensor electrical connector to its appropriate spot. Finally, refill the cooling system.