How to replace a thermostat in a cooling system on GMC Terrain?

Before assuming the thermostat is the problem, check the coolant level, the drive belt tension, and the temperature gauge. For a 3.4L V6 engine, the top engine cover needs to be removed as well as the battery and battery tray. The exhaust crossover pipe should be removed, and then the thermostat housing bolts can be unscrewed to detach it.

Genuine GMC Terrain Thermostat

Engine Coolant Thermostat

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6 Thermostats found

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GMC Terrain Thermostat Assembly, Engine Coolant
Part Number: 12622410
$63.54 MSRP: $144.74
You Save: $81.20 (57%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: THERMOSTAT, Engine Coolant Temperature; Thermostat
- Replaces: 21018811, 55350941, 90537453, 12615097
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2010-2017 GMC Terrain | SLE1 SUV, SLE2 SUV, SLT SUV | 4 Cyl 2.4L
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GMC Terrain Housing Assembly, Engine Coolant Thermostat
Part Number: 12681132
$84.25 MSRP: $176.99
You Save: $92.74 (53%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Housing Assembly, Eng Cool Therm; Thermostat Housing
- Replaces: 12638836, 12603830
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2010-2017 GMC Terrain | SLE2 SUV, SLT SUV | 6 Cyl 3.0L, 6 Cyl 3.6L
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GMC Terrain Housing Assembly, Eng Cool Therm
Part Number: 25201447
$63.30 MSRP: $132.98
You Save: $69.68 (53%)
Ships in 1-2 Business Days
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Product Specifications
- Replaces: 12651603
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2018-2020 GMC Terrain | 4 DOOR SLE2, 4 DOOR SLT1, 4 DOOR SLT2 | 4 Cyl 2.0L
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GMC Terrain Thermostat Assembly, Engine Coolant
Part Number: 55490715
$76.57 MSRP: $155.38
You Save: $78.81 (51%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: THERMOSTAT, Engine Coolant Temperature; Thermostat, Thermostat Unit
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2018-2019 GMC Terrain | 4 DOOR SLE2, 4 DOOR SLT1 | 4 Cyl 1.6L Diesel
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GMC Terrain Housing,Engine Coolant Thermostat
Part Number: 12618159
$70.11 MSRP: $125.76
You Save: $55.65 (45%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: HOUSING, Engine Coolant Thermostat; Thermostat Housing
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2010-2017 GMC Terrain | SLE1 SUV, SLE2 SUV, SLT SUV | 4 Cyl 2.4L
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GMC Terrain Housing Assembly, Engine Coolant Thermostat
Part Number: 12673413
$107.88 MSRP: $193.50
You Save: $85.62 (45%)
Product Specifications
- Other Name: HOUSING, Engine Coolant Thermostat; Thermostat Housing, Thermostat Unit, Water Inlet
- Replaced by: 25205818
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2018-2024 GMC Terrain | 4 DOOR SLE2, 4 DOOR SLE2 , 4 DOOR SLT1, 4 DOOR SLT1 , 4 DOOR SLT2 | 4 Cyl 1.5L

GMC Terrain Thermostat

The Thermostat in GMC Terrain vehicles is one of the core components of cooling system and is generally placed close to the radiator. Its major utility is to maintain the temperature of the engine at the right levels. Thermostats are the closed-loop control devices that decide temperature set point and sense the temperatures of heat transfer fluids and control them. These have in the past included mechanical structures such as; bimetallic strips, wax pellets and other structures such as pneumatic structures that employs air-filled control tubes. The developments that have taken place have increased comfort, accuracy, and efficiency of temperature control in different uses, and thereby providing benefits to GMC Terrain users.

Each OEM GMC Terrain 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.

GMC Terrain Thermostat Parts Questions & Experts Answers

Housing Assembly, Engine Coolant Thermostat
12681132
Q: How to replace a thermostat in a cooling system on GMC Terrain?
A: Before assuming the thermostat is the problem, check the coolant level, the drive belt tension, and the temperature gauge. For a 3.4L V6 engine, the top engine cover needs to be removed as well as the battery and battery tray. The exhaust crossover pipe should be removed, and then the thermostat housing bolts can be unscrewed to detach it.