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International Harvester Thermostat

3 items

Upgrade your vehicle's thermostat with A-Premium's high-quality options. Choose reliability and durability for a smoother ride.

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A-Premium APTHE057 Engine Coolant ThermostatA-Premium APTHE057 Engine Coolant Thermostat
A-Premium®Part # APTHE057
A-Premium APTHE057 Engine Coolant Thermostat
4.683 Reviews
$20.99
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2-year warranty
90 days free return
Fits 2003 - 2009 Chevrolet C4500 Kodiak, 2003 - 2009 Chevrolet C5500 Kodiak, 2006 - 2016 Chevrolet Express 2500, 2006 - 2016 Chevrolet Express 3500, 2009 - 2016 Chevrolet Express 4500, 2001 - 2024 Chevrolet Silverado 2500 HD, 2007 - 2007 Chevrolet Silverado 2500 HD Classic, 2001 - 2006 Chevrolet Silverado 3500, 2007 - 2007 Chevrolet Silverado 3500 Classic, 2007 - 2024 Chevrolet Silverado 3500 HD, 2019 - 2020 Chevrolet Silverado 4500 HD, 2019 - 2020 Chevrolet Silverado 5500 HD, 2019 - 2020 Chevrolet Silverado 6500 HD, 2003 - 2009 GMC C4500 Topkick, 2003 - 2009 GMC C5500 Topkick, 2006 - 2016 GMC Savana 2500, 2006 - 2016 GMC Savana 3500, 2009 - 2016 GMC Savana 4500, 2001 - 2024 GMC Sierra 2500 HD, 2007 - 2007 GMC Sierra 2500 HD Classic
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Vehicle: International Harvester
Item LocatedUnited States
Quantity1
MaterialMetal and Rubber
ConditionNew
item #1005V1U4
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Engine Coolant Thermostat for International Harvester IC Corporation 3000 IC 89℃
A-Premium®Part # APTHE080
Engine Coolant Thermostat for International Harvester IC Corporation 3000 IC 89℃
4.683 Reviews
$54.99
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2-year warranty
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Fits 2003 - 2003 IC Corporation 3800, 2002 - 2002 IC Corporation 3000 IC, 2003 - 2006 IC Corporation CE Commercial, 2004 - 2004 IC Corporation CE Commercial, 2005 - 2007 IC Corporation CE Integrated, 2003 - 2004 IC Corporation CE School Bus, 2003 - 2004 IC Corporation FE Commercial, 2005 - 2005 IC Corporation FE Integrated, 2003 - 2004 IC Corporation FE School Bus, 2006 - 2006 IC Corporation FE School Bus, 2003 - 2007 IC Corporation RE Commercial, 2005 - 2005 IC Corporation RE Integrated, 2003 - 2004 IC Corporation RE School Bus, 2006 - 2007 IC Corporation RE School Bus, 1979 - 1979 International Harvester 1754, 1986 - 1988 International Harvester 1754, 1979 - 1989 International Harvester 1854, 1979 - 1989 International Harvester 1954, 1979 - 1989 International Harvester 1955, 1979 - 1989 International Harvester 2155
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Vehicle: International Harvester
Item LocatedUnited States
Quantity1
ConditionNew
item #1013DY29
Note
Start to Open Temperature: 89℃.
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Engine Coolant Thermostat for Chevrolet Silverado 3500 GMC Sierra 2500 HD Hummer
A-Premium®Part # APTHE058
Engine Coolant Thermostat for Chevrolet Silverado 3500 GMC Sierra 2500 HD Hummer
4.683 Reviews
$17.99
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2-year warranty
90 days free return
Fits 2003 - 2009 Chevrolet C4500 Kodiak, 2003 - 2009 Chevrolet C5500 Kodiak, 2006 - 2016 Chevrolet Express 2500, 2006 - 2016 Chevrolet Express 3500, 2009 - 2016 Chevrolet Express 4500, 2001 - 2024 Chevrolet Silverado 2500 HD, 2007 - 2007 Chevrolet Silverado 2500 HD Classic, 2001 - 2006 Chevrolet Silverado 3500, 2007 - 2007 Chevrolet Silverado 3500 Classic, 2007 - 2024 Chevrolet Silverado 3500 HD, 2019 - 2020 Chevrolet Silverado 4500 HD, 2019 - 2020 Chevrolet Silverado 5500 HD, 2019 - 2020 Chevrolet Silverado 6500 HD, 2003 - 2009 GMC C4500 Topkick, 2003 - 2009 GMC C5500 Topkick, 2006 - 2016 GMC Savana 2500, 2006 - 2016 GMC Savana 3500, 2009 - 2016 GMC Savana 4500, 2018 - 2018 GMC Sierra 2500 HD, 2001 - 2017 GMC Sierra 2500 HD
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: International Harvester
Item LocatedUnited States
Quantity1
ConditionNew
item #1013DUEH
Note
【Note-1】 Start to Open Temperature: 82℃.;
【Note-2】 This item comes with seal.
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What is an engine thermostat?

 While all engines can become too hot, if your thermostat isn't working correctly, your engine's well-being is at serious risk. The engine thermostat, often simply referred to as a thermostat, regulates the engine's operating temperature within an optimal range (typically around 195 to 220 degrees Fahrenheit).

How does a car thermostat work?

As a temperature-sensitive valve within the cooling system, a car thermostat responds to changes in coolant temperature. Understanding how it works by the following breakdown steps:

  • Closed position (cold start)

Initially closed to help the engine warm up quickly.

  • Heating up

The engine generates heat during operation.

  • Opening the thermostat

A temperature-sensitive element (usually wax) causes the thermostat to open gradually.

  • Coolant flow

When open, coolant flows from the engine to the radiator.

  • Maintaining optimal temperature

Adjusts coolant flow to maintain the ideal engine temperature.

  • Temperature regulation

Continuously adjusts to prevent overheating and ensure efficient operation.

Signs of a bad thermostat

  1. Overheating: The engine becomes excessively hot due to a stuck-closed thermostat.
  2. Low or fluctuating temperature: A thermostat stuck open results in a cooler engine, affecting fuel efficiency and heating.
  3. Temperature warning light: Illuminates to indicate engine overheating due to a faulty thermostat.
  4. Poor fuel efficiency: Stuck-open thermostat reduces fuel efficiency as the engine operates less efficiently at lower temperatures.
  5. Inadequate cabin heating: Insufficient cabin heating in cold weather with a thermostat that's stuck open.
  6. Coolant leaks: Gasket or sealing issues can lead to coolant leaks.
  7. Rapid temperature fluctuations: The gauge shows rapid swings between hot and cold.
  8. Engine running hot at idle: Higher engine temperature during idle or in traffic due to restricted coolant flow.
  9. Slow or inconsistent warm-up: Longer-than-normal warm-up times, even in moderate weather.
  10. Inconsistent heater operation: This affects the performance of the vehicle's heater, causing inconsistent or inadequate heating in cold weather.

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Jul 29, 2026