Skip to main content
We offer free shipping on orders over €500!

Mishimoto 2017+ GMC 6.6L Duramax L5P Transmission Thermal Bypass Valve Kit

Upgrade your 2017+ Chevrolet/GMC 6.6L Duramax L5P transmission with the Mishimoto Thermal Bypass Valve Kit. This kit is designed to provide improved cooling and prevent overheating, extending the life of your transmission.

The stock cooling system of the Allison 1000 transmission utilizes an in-line thermal bypass valve that controls fluid flow to the transmission cooler. However, the thermostat inside this valve is prone to failure, which can cause the transmission to overheat. The Mishimoto thermal bypass valve kit includes a fully serviceable thermostat for fast warm-up in cold climates and a thermostat bypass for constant cooling in hot climates.

  • Includes fully-serviceable thermostat for fast warm-up in cold climates and thermostat bypass for constant cooling in hot climates
  • Fits with stock transmission cooler piping, requiring no modification for installation
  • Integrated heat-sink fins provide unique styling and added heat dissipation
  • Helps extend transmission life and prevent overheating
  • Direct fit for 2017+ Chevrolet/GMC 6.6L Duramax L5P
  • Durable CNC-machined billet aluminum construction
  • Eliminates failure-prone bypass valve
  • Installs in less than 1 hour
  • Mishimoto Lifetime Warranty
  • Durable anodized finish
Make Model Year Type
Chevrolet Silverado 2500 HD 2017 High Country
Chevrolet Silverado 2500 HD 2017 LT
Chevrolet Silverado 2500 HD 2017 LTZ
Chevrolet Silverado 2500 HD 2017 WT
Chevrolet Silverado 2500 HD 2018 High Country
Chevrolet Silverado 2500 HD 2018 LT
Chevrolet Silverado 2500 HD 2018 LTZ
Chevrolet Silverado 2500 HD 2018 WT
Chevrolet Silverado 2500 HD 2019 High Country
Chevrolet Silverado 2500 HD 2019 LT
Chevrolet Silverado 2500 HD 2019 LTZ
Chevrolet Silverado 2500 HD 2019 WT
Chevrolet Silverado 2500 HD 2020 High Country
Chevrolet Silverado 2500 HD 2020 LT
Chevrolet Silverado 2500 HD 2020 LTZ
Chevrolet Silverado 2500 HD 2020 WT
Chevrolet Silverado 2500 HD 2021 Custom
Chevrolet Silverado 2500 HD 2021 High Country
Chevrolet Silverado 2500 HD 2021 LT
Chevrolet Silverado 2500 HD 2021 LTZ
Chevrolet Silverado 2500 HD 2021 WT
Chevrolet Silverado 3500 HD 2017 High Country
Chevrolet Silverado 3500 HD 2017 LT
Chevrolet Silverado 3500 HD 2017 LTZ
Chevrolet Silverado 3500 HD 2017 WT
Chevrolet Silverado 3500 HD 2018 High Country
Chevrolet Silverado 3500 HD 2018 LT
Chevrolet Silverado 3500 HD 2018 LTZ
Chevrolet Silverado 3500 HD 2018 WT
Chevrolet Silverado 3500 HD 2019 High Country
Chevrolet Silverado 3500 HD 2019 LT
Chevrolet Silverado 3500 HD 2019 LTZ
Chevrolet Silverado 3500 HD 2019 WT
Chevrolet Silverado 3500 HD 2020 High Country
Chevrolet Silverado 3500 HD 2020 LT
Chevrolet Silverado 3500 HD 2020 LTZ
Chevrolet Silverado 3500 HD 2020 WT
Chevrolet Silverado 3500 HD 2021 High Country
Chevrolet Silverado 3500 HD 2021 LT
Chevrolet Silverado 3500 HD 2021 LTZ
Chevrolet Silverado 3500 HD 2021 WT
GMC Sierra 2500 HD 2017 Base
GMC Sierra 2500 HD 2017 Denali
GMC Sierra 2500 HD 2017 SLE
GMC Sierra 2500 HD 2017 SLT
GMC Sierra 2500 HD 2018 Base
GMC Sierra 2500 HD 2018 Denali
GMC Sierra 2500 HD 2018 SLE
GMC Sierra 2500 HD 2018 SLT
GMC Sierra 2500 HD 2019 Base
GMC Sierra 2500 HD 2019 Denali
GMC Sierra 2500 HD 2019 SLE
GMC Sierra 2500 HD 2019 SLT
GMC Sierra 2500 HD 2020 AT4
GMC Sierra 2500 HD 2020 Base
GMC Sierra 2500 HD 2020 Denali
GMC Sierra 2500 HD 2020 SLE
GMC Sierra 2500 HD 2020 SLT
GMC Sierra 2500 HD 2021 AT4
GMC Sierra 2500 HD 2021 Base
GMC Sierra 2500 HD 2021 Denali
GMC Sierra 2500 HD 2021 SLE
GMC Sierra 2500 HD 2021 SLT
GMC Sierra 3500 HD 2017 Base
GMC Sierra 3500 HD 2017 Denali
GMC Sierra 3500 HD 2017 SLE
GMC Sierra 3500 HD 2017 SLT
GMC Sierra 3500 HD 2018 Base
GMC Sierra 3500 HD 2018 Denali
GMC Sierra 3500 HD 2018 SLE
GMC Sierra 3500 HD 2018 SLT
GMC Sierra 3500 HD 2019 Base
GMC Sierra 3500 HD 2019 Denali
GMC Sierra 3500 HD 2019 SLE
GMC Sierra 3500 HD 2019 SLT
GMC Sierra 3500 HD 2020 AT4
GMC Sierra 3500 HD 2020 Base
GMC Sierra 3500 HD 2020 Denali
GMC Sierra 3500 HD 2020 SLE
GMC Sierra 3500 HD 2020 SLT
GMC Sierra 3500 HD 2021 AT4
GMC Sierra 3500 HD 2021 Base
GMC Sierra 3500 HD 2021 Denali
GMC Sierra 3500 HD 2021 SLE
GMC Sierra 3500 HD 2021 SLT
Mishimoto is the world's leading supplier of high-performance cooling products and was created by automotive enthusiasts for automotive enthusiasts. Since its founding in 2005, Mishimoto has more than a decade of experience working to design and manufacture superior cooling system upgrades. Day after day, the Mishimoto team works to perfect existing solutions and develop new ideas. From product planning, design and development to testing and commissioning, all processes are done in-house. No cooling system leaves the factory without being meticulously checked for quality and performance by the engineers. Mishimoto aluminium radiators from this manufacturer are popular with car fans all over the world.
Contact
Mishimoto
18 Boulden Circle
19720 New Castle
USA

https://www.mishimoto.com/
Responsible person
Streetstylez Ltd. & Co. KG
Heinrich-Lorenz-Str. 2-4
09120 Chemnitz
Germany

info@streetstylez.eu
www.streetstylez.eu
Reviews for “Mishimoto 2017+ GMC 6.6L Duramax L5P Transmission Thermal Bypass Valve Kit”

Average rating of 0 out of 5 stars