How to replace a thermostat in a cooling system on Chevrolet Trailblazer?

Before assuming the thermostat is to blame for a cooling system problem, it is important to check the coolant level, drive belt tension, and temperature gauge (or light) operation. Before starting the replacement process, it is important to disconnect the cable from the negative terminal of the battery and partially drain the cooling system, saving the coolant if it is in good condition. If the fitting that mates with the hose deteriorates, replace the thermostat housing. The thermostat housing can be removed by removing the bolts and tapping it with a soft-face hammer if it is stuck. The mating surfaces on the engine and the thermostat housing should be cleaned, and a new O-ring should be installed in the groove in the housing. The thermostat housing should then be reattached to the intake manifold or water pump housing, depending on the model, and the bolts should be tightened to the proper torque specifications. Finally, the cooling system should be refilled, the engine should be run, and carefully checked for leaks.

Genuine Chevrolet Trailblazer Thermostat

Engine Coolant Thermostat

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Chevrolet Trailblazer Thermostat, Engine Coolant
Part Number: 12600171
$22.34 MSRP: $42.18
You Save: $19.84 (48%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: THERMOSTAT, Engine Coolant Temperature; Thermostat, Thermostat Unit
- Replaces: 12581595
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2004-2006 Chevrolet Trailblazer | 4 DOOR, 4 DOOR EXT | 8 Cyl 5.3L, 8 Cyl 6.0L
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Chevrolet Trailblazer Housing Assembly, Engine Coolant Thermostat
Part Number: 12620112
$57.11 MSRP: $117.88
You Save: $60.77 (52%)
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Product Specifications
- Other Name: HOUSING, Engine Coolant Temperature; Thermostat Housing
- Replaces: 12567750, 12572988, 12602913
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2002-2009 Chevrolet Trailblazer | 4 DOOR, 4 DOOR EXT | 6 Cyl 4.2L
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Chevrolet Trailblazer THERMOSTAT KIT,ENG COOL
Part Number: 19420815
$40.11 MSRP: $79.96
You Save: $39.85 (50%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Thermostat
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2007-2009 Chevrolet Trailblazer | 4 DOOR | 8 Cyl 5.3L, 8 Cyl 6.0L
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Chevrolet Trailblazer Thermostat Assembly, Eng Cool
Part Number: 55503988
$32.27 MSRP: $58.69
You Save: $26.42 (46%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Thermostat
- Replaced by: 25205415
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2021-2025 Chevrolet Trailblazer | 4 DOOR EXT, LEVEL II 4 DOOR EXTENDED, LEVEL III 4DOOR EXTENDED | 3 Cyl 1.2L

Chevrolet Trailblazer Thermostat

Chevrolet Trailblazer being a vehicle entails a Thermostat that helps in controlling the temperature of the engine to an optimum level. Said to be positioned typically at the vicinity of the radiator, the thermostat is viewed as closed loop control instrument primarily responsible for regulating setpoint temperature. Some of the thermostats that has been in used in vehicle cooling systems includes mechanical types such as bimetallic strips and wax pellets and the pneumatic type through the employed air filled control tubes. These thermostats function in the manner that turn on or off heating or cooling mechanisms or vary the heat transfer fluids to improve efficiency and climate inside the car.

Each OEM Chevrolet Trailblazer Thermostat we offer is competitively priced and comes with the assurance of the manufacturer's warranty for the part. Furthermore, we guarantee the speedy delivery of your orders right to your doorstep. Our hassle-free return policy is also in place for your peace of mind.

Chevrolet Trailblazer Thermostat Parts Questions & Experts Answers

Thermostat, Engine Coolant
12600171
Q: How to replace a thermostat in a cooling system on Chevrolet Trailblazer?
A:
Before assuming the thermostat is to blame for a cooling system problem, it is important to check the coolant level, drive belt tension, and temperature gauge (or light) operation. Before starting the replacement process, it is important to disconnect the cable from the negative terminal of the battery and partially drain the cooling system, saving the coolant if it is in good condition. If the fitting that mates with the hose deteriorates, replace the thermostat housing. The thermostat housing can be removed by removing the bolts and tapping it with a soft-face hammer if it is stuck. The mating surfaces on the engine and the thermostat housing should be cleaned, and a new O-ring should be installed in the groove in the housing. The thermostat housing should then be reattached to the intake manifold or water pump housing, depending on the model, and the bolts should be tightened to the proper torque specifications. Finally, the cooling system should be refilled, the engine should be run, and carefully checked for leaks.