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Upgrade your Duramax diesel with Mishimoto's high temperature thermostats designed specifically for Chevrolet and GMC 6.6L engines from 2001 to 2016. These thermostats activate at a higher temperature than OEM parts, making them ideal for colder climates or owners seeking to optimize engine warm-up times. By delaying coolant flow through the radiator, these thermostats help the engine reach and maintain optimal operating temperatures more efficiently, reducing engine wear and improving overall performance. Crafted with precision, they ensure reliable operation across a wide range of Duramax applications, including Silverado, Sierra, Express, Savana, and more, spanning various model years.
Constructed from durable materials, Mishimoto thermostats feature a robust design that withstands high temperatures and demanding driving conditions. Their installation is straightforward for experienced technicians or DIY enthusiasts, providing a seamless upgrade that enhances engine thermal management. Whether you're tackling cold starts, towing in winter, or aiming for better engine efficiency, these thermostats deliver consistent, high-quality performance. Compatible with a broad spectrum of vehicles, they are a perfect choice for those looking to improve cold-weather operation and engine longevity.
Designed with the same specifications as OEM parts but with enhanced temperature activation, Mishimoto's thermostats are a reliable upgrade for diesel enthusiasts. They contribute to faster engine warm-up times, improved fuel efficiency, and reduced engine strain during cold starts. Their compatibility with various transmission types and vehicle configurations makes them a versatile addition to any Duramax-powered vehicle, ensuring you get the most out of your engine's thermal regulation system. Trust Mishimoto for quality, durability, and performance in every component.
Features:
Fitment:
2001 Chevrolet Silverado 2500 HD Base
2001 Chevrolet Silverado 2500 HD LS
2001 Chevrolet Silverado 2500 HD LT
2001 Chevrolet Silverado 3500 Base
2001 Chevrolet Silverado 3500 LS
2001 Chevrolet Silverado 3500 LT
2001 GMC Sierra 2500 HD SL
2001 GMC Sierra 2500 HD SLE
2001 GMC Sierra 2500 HD SLT
2001 GMC Sierra 3500 SL
2001 GMC Sierra 3500 SLE
2001 GMC Sierra 3500 SLT
2002 Chevrolet Silverado 2500 HD Base
2002 Chevrolet Silverado 2500 HD LS
2002 Chevrolet Silverado 2500 HD LT
2002 Chevrolet Silverado 3500 Base
2002 Chevrolet Silverado 3500 LS
2002 Chevrolet Silverado 3500 LT
2002 GMC Sierra 2500 HD Base
2002 GMC Sierra 2500 HD SL
2002 GMC Sierra 2500 HD SLE
2002 GMC Sierra 2500 HD SLT
2002 GMC Sierra 3500 Base
2002 GMC Sierra 3500 SL
2002 GMC Sierra 3500 SLE
2002 GMC Sierra 3500 SLT
2003 Chevrolet Silverado 2500 HD Base
2003 Chevrolet Silverado 2500 HD LS
2003 Chevrolet Silverado 2500 HD LT
2003 Chevrolet Silverado 2500 HD WT
2003 Chevrolet Silverado 3500 Base
2003 Chevrolet Silverado 3500 LS
2003 Chevrolet Silverado 3500 LT
2003 GMC Sierra 2500 HD Base
2003 GMC Sierra 2500 HD SLE
2003 GMC Sierra 2500 HD SLT
2003 GMC Sierra 2500 HD WT
2003 GMC Sierra 3500 Base
2003 GMC Sierra 3500 SLE
2003 GMC Sierra 3500 SLT
2004 Chevrolet Silverado 2500 HD Base
2004 Chevrolet Silverado 2500 HD LS
2004 Chevrolet Silverado 2500 HD LT
2004 Chevrolet Silverado 2500 HD WT
2004 Chevrolet Silverado 3500 Base
2004 Chevrolet Silverado 3500 LS
2004 Chevrolet Silverado 3500 LT
2004 Chevrolet Silverado 3500 WT
2004 GMC Sierra 2500 HD Base
2004 GMC Sierra 2500 HD SLE
2004 GMC Sierra 2500 HD SLT
2004 GMC Sierra 2500 HD WT
2004 GMC Sierra 3500 Base
2004 GMC Sierra 3500 SLE
2004 GMC Sierra 3500 SLT
2004 GMC Sierra 3500 WT
2005 Chevrolet Silverado 2500 HD Base
2005 Chevrolet Silverado 2500 HD LS
2005 Chevrolet Silverado 2500 HD LT
2005 Chevrolet Silverado 2500 HD WT
2005 Chevrolet Silverado 3500 Base
2005 Chevrolet Silverado 3500 LS
2005 Chevrolet Silverado 3500 LT
2005 GMC Sierra 2500 HD Base
2005 GMC Sierra 2500 HD SLE
2005 GMC Sierra 2500 HD SLT
2005 GMC Sierra 2500 HD WT
2005 GMC Sierra 3500 Base
2005 GMC Sierra 3500 SLE
2005 GMC Sierra 3500 SLT
2005 GMC Sierra 3500 WT
2006 Chevrolet Express 2500 Base
2006 Chevrolet Express 2500 LS
2006 Chevrolet Express 2500 LT
2006 Chevrolet Express 3500 Base
2006 Chevrolet Express 3500 LS
2006 Chevrolet Express 3500 LT
2006 Chevrolet Silverado 2500 HD LS
2006 Chevrolet Silverado 2500 HD LT
2006 Chevrolet Silverado 2500 HD WT
2006 Chevrolet Silverado 3500 LS
2006 Chevrolet Silverado 3500 LT
2006 Chevrolet Silverado 3500 WT
2006 GMC Savana 2500 Base
2006 GMC Savana 3500 Base
2006 GMC Savana 3500 LS
2006 GMC Savana 3500 LT
2006 GMC Sierra 2500 HD SL
2006 GMC Sierra 2500 HD SLE
2006 GMC Sierra 2500 HD SLT
2006 GMC Sierra 2500 HD WT
2006 GMC Sierra 3500 SL
2006 GMC Sierra 3500 SLE
2006 GMC Sierra 3500 SLT
2006 GMC Sierra 3500 WT
2007 Chevrolet Express 2500 Base
2007 Chevrolet Express 2500 LS
2007 Chevrolet Express 2500 LT
2007 Chevrolet Express 3500 Base
2007 Chevrolet Express 3500 LS
2007 Chevrolet Express 3500 LT
2007 Chevrolet Silverado 2500 HD LT
2007 Chevrolet Silverado 2500 HD LTZ
2007 Chevrolet Silverado 2500 HD WT
2007 Chevrolet Silverado 2500 HD Classic LS
2007 Chevrolet Silverado 2500 HD Classic LT
2007 Chevrolet Silverado 2500 HD Classic WT
2007 Chevrolet Silverado 3500 Classic LS
2007 Chevrolet Silverado 3500 Classic LT
2007 Chevrolet Silverado 3500 Classic WT
2007 Chevrolet Silverado 3500 HD LT
2007 Chevrolet Silverado 3500 HD LTZ
2007 Chevrolet Silverado 3500 HD WT
2007 GMC Savana 2500 Base
2007 GMC Savana 2500 LS
2007 GMC Savana 2500 LT
2007 GMC Savana 3500 Base
2007 GMC Savana 3500 LS
2007 GMC Savana 3500 LT
2007 GMC Sierra 2500 HD SLE
2007 GMC Sierra 2500 HD SLT
2007 GMC Sierra 2500 HD WT
2007 GMC Sierra 2500 HD Classic SL
2007 GMC Sierra 2500 HD Classic SLE
2007 GMC Sierra 2500 HD Classic SLT
2007 GMC Sierra 2500 HD Classic WT
2007 GMC Sierra 3500 Classic SL
2007 GMC Sierra 3500 Classic SLE
2007 GMC Sierra 3500 Classic SLT
2007 GMC Sierra 3500 Classic WT
2007 GMC Sierra 3500 HD SLE
2007 GMC Sierra 3500 HD SLT
2007 GMC Sierra 3500 HD WT
2008 Chevrolet Express 2500 Base
2008 Chevrolet Express 2500 LS
2008 Chevrolet Express 2500 LT
2008 Chevrolet Express 3500 Base
2008 Chevrolet Express 3500 LS
2008 Chevrolet Express 3500 LT
2008 Chevrolet Silverado 2500 HD LT
2008 Chevrolet Silverado 2500 HD LTZ
2008 Chevrolet Silverado 2500 HD WT
2008 Chevrolet Silverado 3500 HD LT
2008 Chevrolet Silverado 3500 HD LTZ
2008 Chevrolet Silverado 3500 HD WT
2008 GMC Savana 2500 Base
2008 GMC Savana 2500 LS
2008 GMC Savana 2500 LT
2008 GMC Savana 3500 Base
2008 GMC Savana 3500 LS
2008 GMC Savana 3500 LT
2008 GMC Sierra 2500 HD SLE
2008 GMC Sierra 2500 HD SLT
2008 GMC Sierra 2500 HD WT
2008 GMC Sierra 3500 HD SLE
2008 GMC Sierra 3500 HD SLT
2008 GMC Sierra 3500 HD WT
2009 Chevrolet Express 2500 Base
2009 Chevrolet Express 2500 LS
2009 Chevrolet Express 2500 LT
2009 Chevrolet Express 3500 Base
2009 Chevrolet Express 3500 LS
2009 Chevrolet Express 3500 LT
2009 Chevrolet Silverado 2500 HD LT
2009 Chevrolet Silverado 2500 HD LTZ
2009 Chevrolet Silverado 2500 HD WT
2009 Chevrolet Silverado 3500 HD LT
2009 Chevrolet Silverado 3500 HD LTZ
2009 Chevrolet Silverado 3500 HD WT
2009 GMC Savana 2500 Base
2009 GMC Savana 2500 LS
2009 GMC Savana 2500 LT
2009 GMC Savana 3500 Base
2009 GMC Savana 3500 LS
2009 GMC Savana 3500 LT
2009 GMC Sierra 2500 HD SLE
2009 GMC Sierra 2500 HD SLT
2009 GMC Sierra 2500 HD WT
2009 GMC Sierra 3500 HD SLE
2009 GMC Sierra 3500 HD SLT
2009 GMC Sierra 3500 HD WT
2010 Chevrolet Express 2500 Base
2010 Chevrolet Express 2500 LS
2010 Chevrolet Express 2500 LT
2010 Chevrolet Express 3500 Base
2010 Chevrolet Express 3500 LS
2010 Chevrolet Express 3500 LT
2010 Chevrolet Silverado 2500 HD LT
2010 Chevrolet Silverado 2500 HD LTZ
2010 Chevrolet Silverado 2500 HD WT
2010 Chevrolet Silverado 3500 HD LT
2010 Chevrolet Silverado 3500 HD LTZ
2010 Chevrolet Silverado 3500 HD WT
2010 GMC Savana 2500 Base
2010 GMC Savana 2500 LS
2010 GMC Savana 2500 LT
2010 GMC Savana 3500 Base
2010 GMC Savana 3500 LS
2010 GMC Savana 3500 LT
2010 GMC Sierra 2500 HD SLE
2010 GMC Sierra 2500 HD SLT
2010 GMC Sierra 2500 HD WT
2010 GMC Sierra 3500 HD SLE
2010 GMC Sierra 3500 HD SLT
2010 GMC Sierra 3500 HD WT
2011 Chevrolet Express 2500 Base
2011 Chevrolet Express 2500 LS
2011 Chevrolet Express 2500 LT
2011 Chevrolet Express 3500 Base
2011 Chevrolet Express 3500 LS
2011 Chevrolet Express 3500 LT
2011 Chevrolet Silverado 2500 HD LT
2011 Chevrolet Silverado 2500 HD LTZ
2011 Chevrolet Silverado 2500 HD WT
2011 Chevrolet Silverado 3500 HD LT
2011 Chevrolet Silverado 3500 HD LTZ
2011 Chevrolet Silverado 3500 HD WT
2011 GMC Savana 2500 Base
2011 GMC Savana 2500 LS
2011 GMC Savana 2500 LT
2011 GMC Savana 3500 Base
2011 GMC Savana 3500 LS
2011 GMC Savana 3500 LT
2011 GMC Sierra 2500 HD Denali
2011 GMC Sierra 2500 HD SLE
2011 GMC Sierra 2500 HD SLT
2011 GMC Sierra 2500 HD WT
2011 GMC Sierra 3500 HD Denali
2011 GMC Sierra 3500 HD SLE
2011 GMC Sierra 3500 HD SLT
2011 GMC Sierra 3500 HD WT
2012 Chevrolet Express 2500 Base
2012 Chevrolet Express 2500 LS
2012 Chevrolet Express 2500 LT
2012 Chevrolet Express 3500 Base
2012 Chevrolet Express 3500 LS
2012 Chevrolet Express 3500 LT
2012 Chevrolet Silverado 2500 HD LT
2012 Chevrolet Silverado 2500 HD LTZ
2012 Chevrolet Silverado 2500 HD WT
2012 Chevrolet Silverado 3500 HD LT
2012 Chevrolet Silverado 3500 HD LTZ
2012 Chevrolet Silverado 3500 HD WT
2012 GMC Savana 2500 Base
2012 GMC Savana 2500 LS
2012 GMC Savana 2500 LT
2012 GMC Savana 3500 Base
2012 GMC Savana 3500 LS
2012 GMC Savana 3500 LT
2012 GMC Sierra 2500 HD Denali
2012 GMC Sierra 2500 HD SLE
2012 GMC Sierra 2500 HD SLT
2012 GMC Sierra 2500 HD WT
2012 GMC Sierra 3500 HD Denali
2012 GMC Sierra 3500 HD SLE
2012 GMC Sierra 3500 HD SLT
2012 GMC Sierra 3500 HD WT
2013 Chevrolet Express 2500 Base
2013 Chevrolet Express 2500 LS
2013 Chevrolet Express 2500 LT
2013 Chevrolet Express 3500 Base
2013 Chevrolet Express 3500 LS
2013 Chevrolet Express 3500 LT
2013 Chevrolet Silverado 2500 HD LT
2013 Chevrolet Silverado 2500 HD LTZ
2013 Chevrolet Silverado 2500 HD WT
2013 Chevrolet Silverado 3500 HD LT
2013 Chevrolet Silverado 3500 HD LTZ
2013 Chevrolet Silverado 3500 HD WT
2013 GMC Savana 2500 Base
2013 GMC Savana 2500 LS
2013 GMC Savana 2500 LT
2013 GMC Savana 3500 Base
2013 GMC Savana 3500 LS
2013 GMC Savana 3500 LT
2013 GMC Sierra 2500 HD Denali
2013 GMC Sierra 2500 HD SLE
2013 GMC Sierra 2500 HD SLT
2013 GMC Sierra 2500 HD WT
2013 GMC Sierra 3500 HD Denali
2013 GMC Sierra 3500 HD SLE
2013 GMC Sierra 3500 HD SLT
2013 GMC Sierra 3500 HD WT
2014 Chevrolet Express 2500 Base
2014 Chevrolet Express 2500 LS
2014 Chevrolet Express 2500 LT
2014 Chevrolet Express 3500 Base
2014 Chevrolet Express 3500 LS
2014 Chevrolet Express 3500 LT
2014 Chevrolet Silverado 2500 HD LT
2014 Chevrolet Silverado 2500 HD LTZ
2014 Chevrolet Silverado 2500 HD WT
2014 Chevrolet Silverado 3500 HD LT
2014 Chevrolet Silverado 3500 HD LTZ
2014 Chevrolet Silverado 3500 HD WT
2014 GMC Savana 2500 Base
2014 GMC Savana 2500 LS
2014 GMC Savana 2500 LT
2014 GMC Savana 3500 Base
2014 GMC Savana 3500 LS
2014 GMC Savana 3500 LT
2014 GMC Sierra 2500 HD Denali
2014 GMC Sierra 2500 HD SLE
2014 GMC Sierra 2500 HD SLT
2014 GMC Sierra 2500 HD WT
2014 GMC Sierra 3500 HD Denali
2014 GMC Sierra 3500 HD SLE
2014 GMC Sierra 3500 HD SLT
2014 GMC Sierra 3500 HD WT
2015 Chevrolet Express 2500 Base
2015 Chevrolet Express 2500 LS
2015 Chevrolet Express 2500 LT
2015 Chevrolet Express 3500 Base
2015 Chevrolet Express 3500 LS
2015 Chevrolet Express 3500 LT
2015 Chevrolet Silverado 2500 HD High Country
2015 Chevrolet Silverado 2500 HD LT
2015 Chevrolet Silverado 2500 HD LTZ
2015 Chevrolet Silverado 2500 HD WT
2015 Chevrolet Silverado 3500 HD High Country
2015 Chevrolet Silverado 3500 HD LT
2015 Chevrolet Silverado 3500 HD LTZ
2015 Chevrolet Silverado 3500 HD WT
2015 GMC Savana 2500 Base
2015 GMC Savana 2500 LS
2015 GMC Savana 2500 LT
2015 GMC Savana 3500 Base
2015 GMC Savana 3500 LS
2015 GMC Savana 3500 LT
2015 GMC Sierra 2500 HD Base
2015 GMC Sierra 2500 HD Denali
2015 GMC Sierra 2500 HD SLE
2015 GMC Sierra 2500 HD SLT
2015 GMC Sierra 3500 HD Base
2015 GMC Sierra 3500 HD Denali
2015 GMC Sierra 3500 HD SLE
2015 GMC Sierra 3500 HD SLT
2016 Chevrolet Express 2500 Base
2016 Chevrolet Express 2500 LS
2016 Chevrolet Express 2500 LT
2016 Chevrolet Express 3500 Base
2016 Chevrolet Express 3500 LS
2016 Chevrolet Express 3500 LT
2016 Chevrolet Silverado 2500 HD High Country
2016 Chevrolet Silverado 2500 HD LT
2016 Chevrolet Silverado 2500 HD LTZ
2016 Chevrolet Silverado 2500 HD WT
2016 Chevrolet Silverado 3500 HD High Country
2016 Chevrolet Silverado 3500 HD LT
2016 Chevrolet Silverado 3500 HD LTZ
2016 Chevrolet Silverado 3500 HD WT
2016 GMC Savana 2500 Base
2016 GMC Savana 2500 LS
2016 GMC Savana 2500 LT
2016 GMC Savana 3500 Base
2016 GMC Savana 3500 LS
2016 GMC Savana 3500 LT
2016 GMC Sierra 2500 HD Base
2016 GMC Sierra 2500 HD Denali
2016 GMC Sierra 2500 HD SLE
2016 GMC Sierra 2500 HD SLT
2016 GMC Sierra 3500 HD Base
2016 GMC Sierra 3500 HD Denali
2016 GMC Sierra 3500 HD SLE
2016 GMC Sierra 3500 HD SLT
2017 Chevrolet Silverado 2500 HD High Country
2017 Chevrolet Silverado 2500 HD LT
2017 Chevrolet Silverado 2500 HD LTZ
2017 Chevrolet Silverado 2500 HD WT
2017 Chevrolet Silverado 3500 HD High Country
2017 Chevrolet Silverado 3500 HD LT
2017 Chevrolet Silverado 3500 HD LTZ
2017 Chevrolet Silverado 3500 HD WT
2017 GMC Sierra 2500 HD Base
2017 GMC Sierra 2500 HD Denali
2017 GMC Sierra 2500 HD SLE
2017 GMC Sierra 2500 HD SLT
2017 GMC Sierra 3500 HD Base
2017 GMC Sierra 3500 HD Denali
2017 GMC Sierra 3500 HD SLE
2017 GMC Sierra 3500 HD SLT
2018 Chevrolet Silverado 2500 HD High Country
2018 Chevrolet Silverado 2500 HD LT
2018 Chevrolet Silverado 2500 HD LTZ
2018 Chevrolet Silverado 2500 HD WT
2018 Chevrolet Silverado 3500 HD High Country
2018 Chevrolet Silverado 3500 HD LT
2018 Chevrolet Silverado 3500 HD LTZ
2018 Chevrolet Silverado 3500 HD WT
2018 GMC Sierra 2500 HD Base
2018 GMC Sierra 2500 HD Denali
2018 GMC Sierra 2500 HD SLE
2018 GMC Sierra 2500 HD SLT
2018 GMC Sierra 3500 HD Base
2018 GMC Sierra 3500 HD Denali
2018 GMC Sierra 3500 HD SLE
2018 GMC Sierra 3500 HD SLT
2019 Chevrolet Silverado 2500 HD High Country
2019 Chevrolet Silverado 2500 HD LT
2019 Chevrolet Silverado 2500 HD LTZ
2019 Chevrolet Silverado 2500 HD WT
2019 Chevrolet Silverado 3500 HD High Country
2019 Chevrolet Silverado 3500 HD LT
2019 Chevrolet Silverado 3500 HD LTZ
2019 Chevrolet Silverado 3500 HD WT
2019 GMC Sierra 2500 HD Base
2019 GMC Sierra 2500 HD Denali
2019 GMC Sierra 2500 HD SLE
2019 GMC Sierra 2500 HD SLT
2019 GMC Sierra 3500 HD Base
2019 GMC Sierra 3500 HD Denali
2019 GMC Sierra 3500 HD SLE
2019 GMC Sierra 3500 HD SLT
2020 Chevrolet Silverado 2500 HD Custom
2020 Chevrolet Silverado 2500 HD High Country
2020 Chevrolet Silverado 2500 HD LT
2020 Chevrolet Silverado 2500 HD LTZ
2020 Chevrolet Silverado 2500 HD WT
2020 Chevrolet Silverado 3500 HD High Country
2020 Chevrolet Silverado 3500 HD LT
2020 Chevrolet Silverado 3500 HD LTZ
2020 Chevrolet Silverado 3500 HD WT
2020 GMC Sierra 2500 HD AT4
2020 GMC Sierra 2500 HD Base
2020 GMC Sierra 2500 HD Denali
2020 GMC Sierra 2500 HD SLE
2020 GMC Sierra 2500 HD SLT
2020 GMC Sierra 3500 HD AT4
2020 GMC Sierra 3500 HD Base
2020 GMC Sierra 3500 HD Denali
2020 GMC Sierra 3500 HD SLE
2020 GMC Sierra 3500 HD SLT
2021 Chevrolet Silverado 2500 HD Custom
2021 Chevrolet Silverado 2500 HD High Country
2021 Chevrolet Silverado 2500 HD LT
2021 Chevrolet Silverado 2500 HD LTZ
2021 Chevrolet Silverado 2500 HD WT
2021 Chevrolet Silverado 3500 HD High Country
2021 Chevrolet Silverado 3500 HD LT
2021 Chevrolet Silverado 3500 HD LTZ
2021 Chevrolet Silverado 3500 HD WT
2021 GMC Sierra 2500 HD AT4
2021 GMC Sierra 2500 HD Base
2021 GMC Sierra 2500 HD Denali
2021 GMC Sierra 2500 HD SLE
2021 GMC Sierra 2500 HD SLT
2021 GMC Sierra 3500 HD AT4
2021 GMC Sierra 3500 HD Base
2021 GMC Sierra 3500 HD Denali
2021 GMC Sierra 3500 HD SLE
2021 GMC Sierra 3500 HD SLT
Order Processing
All orders are processed and shipped within 24 hours of purchase (excluding weekends and holidays).
Orders placed after 3:00 PM EST may ship the following business day.
Shipping Methods
Customers select their preferred shipping method and speed at checkout.
Shipping times are determined by the carrier and cannot be guaranteed by us.
Tracking information will be provided once your order has shipped.
Shipping Coverage
If your package arrives damaged, please notify the delivery driver immediately and contact the shipping carrier to file a claim.
You must report any missing or damaged items within 14 days of delivery.
After this time, we cannot be held responsible for lost or damaged items.
Return Window
You have 30 days from the date of delivery to request a return.
After 30 days, we are unable to accept returns, exchanges, or refund requests.
Eligibility
Items must be returned in their original condition—unused, unwashed, and with all tags and packaging intact.
Certain products may not be eligible for return (e.g., special-order items, customized products, or perishable goods).
Items that have been altered, installed, or modified cannot be returned.
Return Process
Contact our Customer Support team to request a Return Authorization (RMA) before sending items back.
Once your return is approved, you’ll receive instructions on where to send the product.
Customers are responsible for return shipping costs unless the item was defective or incorrect.
Refunds
Refunds are issued to the original payment method once the returned item has been received and inspected.
Please allow 5–10 business days for the refund to appear on your account.
In some cases, a restocking fee may apply (if applicable, this will be disclosed during your return authorization).
