Hummer H2 Car Thermostat Replacement at your home or office.

Our mobile mechanics offer services 7 days a week. Upfront and transparent pricing.

Get an upfront price

Service Location

Average rating from customers who
received a Thermostat Replacement.
Learn More

$218.38 - $264.35

Price range for all vehicles


YourMechanic Benefits

Online Booking

Mechanic comes to you

12-month / 12k-mile warranty

Free 50 point safety inspection

Our certified mobile mechanics can come to your home or office 7 days a week between 7 AM and 9 PM.

Average rating from customers who
received a Thermostat Replacement.
Learn More


Car Thermostat Replacement Estimate for Hummer H2

Hummer H2 Car Thermostat Replacement costs $241 on average.

CarServiceEstimateShop/Dealer Price
2003 Hummer H2V8-6.0LService typeCar Thermostat ReplacementEstimate$301.78Shop/Dealer Price$360.19 - $487.70
2009 Hummer H2V8-6.2LService typeCar Thermostat ReplacementEstimate$357.72Shop/Dealer Price$430.22 - $599.76
2005 Hummer H2V8-6.0LService typeCar Thermostat ReplacementEstimate$314.50Shop/Dealer Price$372.65 - $502.06
2006 Hummer H2V8-6.0LService typeCar Thermostat ReplacementEstimate$308.66Shop/Dealer Price$371.92 - $506.94
2004 Hummer H2V8-6.0LService typeCar Thermostat ReplacementEstimate$305.50Shop/Dealer Price$362.75 - $491.47
2008 Hummer H2V8-6.2LService typeCar Thermostat ReplacementEstimate$366.72Shop/Dealer Price$436.36 - $603.75
2007 Hummer H2V8-6.0LService typeCar Thermostat ReplacementEstimate$366.72Shop/Dealer Price$436.64 - $604.24
Show example Hummer H2 Car Thermostat Replacement prices

Car Thermostat Replacement Service

What is an engine cooling system thermostat and how does it work?

The car's engine cooling system thermostat is a small valve within a cooling system passageway that opens and closes in response to the temperature of the circulating engine coolant. When your car is first started and the coolant is cold, the valve in the thermostat will be in the closed position, circulating the coolant flow only within the engine instead of flowing to the radiator, which allows the engine to warm up fast, promoting fuel efficiency, low emissions, and reduced engine deposits. Once the engine coolant reaches the design temperature, usually around 195 degrees, the valve will open and close as you drive in order to maintain a coolant temperature typically between 195 to 225 degrees Fahrenheit.

Thermostat

When to consider replacing the engine cooling system thermostat:

  • Engine overheats. A thermostat with the valve stuck closed is a common cause of engine overheating. However, since there are other causes of overheating, a mechanic will thoroughly inspect the cooling system prior to condemning the thermostat. Since it is usually not known how badly the engine overheated, the mechanic will also try to determine if there is evidence that the cylinder head gasket was blown. If so, it would be repaired prior to replacing the thermostat.
  • Temperature gauge reads too low or too high. Thermostats can get sticky, causing the engine temperature to stray from the optimal range. Your dash-mounted temperature gauge will notify you of this malfunction.
  • Cooling system repairs. All thermostats eventually fail. Therefore, if the cooling system is already open for major repairs, such as water pump or radiator replacement, it is recommended to install a new thermostat simply as insurance against future breakdown.

How do mechanics replace the engine cooling system thermostat?

  • Once the engine is completely cold, the radiator cap is loosened and enough coolant is drained from the radiator so the coolant level is below the thermostat housing.
  • The thermostat housing is removed and the thermostat and gasket are extracted. Note that some cars have more than one cooling system thermostat and both might need replacement.
  • All mounting surfaces on the thermostat housing are cleaned of old gasket material. A new gasket is applied and the thermostat is re-installed in the correct orientation and with the temperature sensing cylinder facing downward towards the engine.
  • The thermostat housing bolts are tightened to original equipment manufacturer (OEM) specifications using a calibrated inch-pound torque wrench.
  • The cooling system is refilled with the appropriate coolant type and the system is fully bled of all air.
  • The car engine is run until the normal operating temperature is reached, and while taking precautions with the hot coolant, the coolant level is rechecked while confirming there is flow through the radiator — either visually or with an infrared temperature gun. This will confirm the thermostat is open. Finally, the engine is checked for leaks.

Is it safe to drive with an engine cooling system thermostat problem?

No. If it has been determined that there is a thermostat problem, it should be repaired right away. Failure to do so can cause substantial and costly damage to the engine.

When replacing the engine cooling system thermostat keep in mind:

  • Engine overheating due to causes other than a faulty thermostat, will themselves damage a thermostat. Therefore, always replace the thermostat if the engine overheats, even if the thermostat was not the initial cause of the overheating.
  • The thermostat should be replaced anytime you have major work done on the coolant system. It is convenient and costs little during such repairs and insurance against future breakdown.
  • OEM thermostats are the best ones to use and you can request your mechanic to install only the OEM thermostat. Dealer supplied, OEM thermostats are sometimes more costly but are generally higher quality and specifically engineered for your car.

Fast and easy service at your home or office

Backed by 12-month, 12.000-mile guarantee


Meet some of our expert Hummer mechanics

Real customer reviews from Hummer owners like you.

Excellent Rating


YourMechanic Hummer H2 Service

Average Rating

5/5

Number of Reviews

119

Rating Summary
114
5
0
0
0
114
5
0
0
0

Refugio

16 years of experience
51 reviews
Refugio
16 years of experience
Hummer H2 - Thermostat - San Antonio, Texas
I met Robert today....he is a very knowledgeable mechanic, punctual, professional, and therough as well. I will hire Mr.Rodriguez again down the road for more work , no doubt.

Christopher

24 years of experience
80 reviews
Christopher
24 years of experience
Hummer H2 - Wipers are not working - Slidell, Louisiana
Very experienced in auto mechanics. Friendly and we had a open and honest discussion on the vehicle's needs beyond the wiper issue.

Joshua

26 years of experience
709 reviews
Joshua
26 years of experience
Hummer H2 - 90,000 Miles Maintenance Service - Antioch, California
I was very comfortable leaving my vehicle in the mechanics hands. I plan to continue having my vehicle serviced through Your Mechanic Thank you for the piece of mind.

Jamahl

19 years of experience
830 reviews
Jamahl
19 years of experience
Hummer H2 - Spark Plugs - Orlando, Florida
Awesome Job!!! Came out early, diagnosed my issue and was able to squeeze me in later that day to fix the problem. Very professional!

Excellent Rating


YourMechanic Hummer H2 Service

Average Rating

5/5

Number of Reviews

119

Rating Summary
114
5
0
0
0
114
5
0
0
0
Number of Hummer H2 services completed
1309+
services done by our mechanics
TOTAL NUMBER OF EXPERT Hummer MECHANICS
200+
experts on our platform

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1 (855) 347-2779 · hi@yourmechanic.com