How to replace the engine coolant thermostat on 5.3L and 6.0L engines on Chevrolet Trailblazer?

Engine coolant Thermostat replacement starts with radiator outlet hose removal on vehicles with 5.3l and 6.0l engines. Start by removing the bolts from the Water Pump inlet. Then detach the Water Pump inlet together with its attached Thermostat from the pump. After securing the Thermostat Housing onto the Water Pump install the parts following the provided fastener details. Tighten Thermostat Housing bolts to 15 n.m (11 lb ft) torque specifications. You must replace the radiator outlet hose during the final installation step. A separate service of the Thermostat is not possible; both Water Pump inlet and Thermostat need replacement as a single unit. Both the Water Pump inlet and Thermostat need replacement as a single unit.

OEM Chevrolet Trailblazer Thermostat

Engine Coolant Thermostat

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4 Thermostats found

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Chevrolet Trailblazer Thermostat Part Number: 89018168
$36.41 MSRP: $72.25
You Save: $35.84 (50%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Engine Coolant Thermostat; Thermostat, Engine Coolant Temperature
- Replaces: 89017851
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2007-2009 Chevrolet Trailblazer | Base, LS, LT, SS | 8 Cyl 5.3 L GAS, 8 Cyl 6.0 L GAS
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Chevrolet Trailblazer Thermostat Housing Part Number: 12620112
$57.36 MSRP: $117.88
You Save: $60.52 (52%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Housing, Engine Coolant Temperature; Thermostat Housing Cover; Housing, Engine Coolant Thermostat
- Replaces: 12567750, 12572988, 12602913
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2002-2009 Chevrolet Trailblazer | Base, LS, LT, LTZ, North Face, SS | 6 Cyl 4.2 L GAS, 8 Cyl 5.3 L GAS, 8 Cyl 6.0 L GAS
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Chevrolet Trailblazer Thermostat Unit Part Number: 12600171
$24.02 MSRP: $45.12
You Save: $21.10 (47%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Thermostat, Engine Coolant Temperature; Thermostat
- Replaces: 12581595
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2006-2008 Chevrolet Trailblazer | Base, LS, LT, SS | 8 Cyl 5.3 L GAS, 8 Cyl 6.0 L GAS
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Chevrolet Trailblazer Thermostat Part Number: 55503988
$31.25 MSRP: $58.69
You Save: $27.44 (47%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Thermostat Assembly-Engine Coolant; Thermostat, Engine Coolant Temperature
- Replaced by: 25205415
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2021-2024 Chevrolet Trailblazer | L, LS, LT | 3 Cyl 1.2 L GAS

Chevrolet Trailblazer Thermostat

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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.

Chevrolet Trailblazer Thermostat Parts and Q&A

Thermostat Unit
12600171
Q: How to replace the engine coolant thermostat on 5.3L and 6.0L engines on Chevrolet Trailblazer?
A:
Engine coolant Thermostat replacement starts with radiator outlet hose removal on vehicles with 5.3l and 6.0l engines. Start by removing the bolts from the Water Pump inlet. Then detach the Water Pump inlet together with its attached Thermostat from the pump. After securing the Thermostat Housing onto the Water Pump install the parts following the provided fastener details. Tighten Thermostat Housing bolts to 15 n.m (11 lb ft) torque specifications. You must replace the radiator outlet hose during the final installation step. A separate service of the Thermostat is not possible; both Water Pump inlet and Thermostat need replacement as a single unit. Both the Water Pump inlet and Thermostat need replacement as a single unit.