How to replace a thermostat in a cooling system for Chevrolet Cobalt,HHR,Saturn ION and Pontiac G5?

Before faulting the thermostat, check the coolant level, drive belt tension, and temperature gauge. To replace the thermostat, disconnect the battery's negative terminal and drain the coolant. Detach the hoses from the thermostat housing cover. Remove the thermostat and install a new gasket.

Genuine Chevrolet HHR Thermostat

Engine Coolant Thermostat

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4 Thermostats found

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Chevrolet HHR Thermostat Assembly, Engine Coolant
Part Number: 12622410
- Other Name: THERMOSTAT, Engine Coolant Temperature; Thermostat
- Replaces: 21018811, 90537453, 55350941, 12615097
$75.03 MSRP: $152.26
You Save: $77.23 (51%)

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Fits the following Vehicles:
2006-2011 Chevrolet HHR | 5 DOOR HIGH ROOF HATCHBACK, 5 DOOR HIGH ROOF HATCHBACK SS, 5 DOOR HIGH ROOF PANEL, 5 DOOR HIGH ROOF PANEL SS, 5 DOOR UPLEVEL HIGH ROOF HATCHBACK, 5 DOOR UPLEVEL HIGH ROOF PANEL | 4 Cyl 2.0L, 4 Cyl 2.2L, 4 Cyl 2.2L Flex, 4 Cyl 2.4L
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Chevrolet HHR Housing Assembly, Engine Coolant Thermostat
Part Number: 12597172
- Other Name: HOUSING, Engine Coolant Thermostat; Thermostat Housing, Water Manifold
$89.11 MSRP: $187.21
You Save: $98.10 (53%)

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More Info
Fits the following Vehicles:
2006-2011 Chevrolet HHR | 5 DOOR HIGH ROOF HATCHBACK, 5 DOOR HIGH ROOF HATCHBACK SS, 5 DOOR HIGH ROOF PANEL, 5 DOOR HIGH ROOF PANEL SS, 5 DOOR UPLEVEL HIGH ROOF HATCHBACK, 5 DOOR UPLEVEL HIGH ROOF PANEL | 4 Cyl 2.2L, 4 Cyl 2.2L Flex, 4 Cyl 2.4L
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Chevrolet HHR Housing Assembly, Engine Coolant Thermostat
Part Number: 12605853
- Other Name: HOUSING, Engine Coolant Thermostat; Thermostat Housing
$90.64 MSRP: $190.42
You Save: $99.78 (53%)

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More Info
Fits the following Vehicles:
2008-2010 Chevrolet HHR | 5 DOOR HIGH ROOF HATCHBACK SS, 5 DOOR HIGH ROOF PANEL SS | 4 Cyl 2.0L
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View related parts
Chevrolet HHR Housing Assembly, Engine Coolant Thermostat
Part Number: 12590275
- Other Name: HOUSING, Engine Coolant Thermostat; Thermostat Housing
More Info
Fits the following Vehicles:
2008 Chevrolet HHR | 5 DOOR HIGH ROOF HATCHBACK SS | 4 Cyl 2.0L
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Chevrolet HHR Thermostat Parts Questions & Answers

Housing Assembly, Engine Coolant Thermostat
12597172
Q: How to replace a thermostat in a cooling system for Chevrolet Cobalt,HHR,Saturn ION and Pontiac G5?
A: Before faulting the thermostat, check the coolant level, drive belt tension, and temperature gauge. To replace the thermostat, disconnect the battery's negative terminal and drain the coolant. Detach the hoses from the thermostat housing cover. Remove the thermostat and install a new gasket.