★★★★★ 5
Great, affordable upgrade
Style: 36 Sqft 80 mil
Easy to use and install. Great upgrade
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 8, 2026
Mishimoto 2017+ GMC 6.6L Duramax L5P Transmission Thermal Bypass Valve Kit
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
Mishimoto 2017+ GMC 6.6L Duramax L5P Transmission Thermal Bypass Valve KitSKU: MMTC L5P TBVFF UPC: 840197710609 Mishimoto 2017+ GMC 6. 6L Duramax L5P Transmission Thermal Bypass Valve Kit Upgrade your 2017 2021 Chevrolet Silverado 2500 HD 3500 HD and GMC Sierra 2500 HD 3500 HD with L5P 6. 6L Duramax using the Mishimoto full flow thermal bypass valve kit. This direct fit replacement eliminates the stock thermostat that fails and blocks fluid flow to the cooler causing overheating. Experience constant transmission cooling for
Quick Dispatch:
Your Mishimoto 2017+ GMC 6.6L Duramax L5P Transmission Thermal Bypass Valve Kit orders ship within 1-2 business days.
Delivery Options:
- Standard: 3-7 business days
- Fast: 2-3 business days
- Express: 1-2 business days
Order Tracking:
You'll receive a tracking link by email once your Mishimoto 2017+ GMC 6.6L Duramax L5P Transmission Thermal Bypass Valve Kit ships.
Need Help?
Questions about Mishimoto 2017+ GMC 6.6L Duramax L5P Transmission Thermal Bypass Valve Kit, sizing, or delivery? We're just an email away.
Live Shipping Estimates:
Enter your location at checkout to see available shipping methods and costs for Mishimoto 2017+ GMC 6.6L Duramax L5P Transmission Thermal Bypass Valve Kit in your area.
Get Shipping Estimates
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
You may also like
Burly Brand 89-99 XL Rear Lowering Kit - Black
101.95
Mishimoto Shift Boot Retainer/Adapter M12x1.25 - Black
12.95
Ticon Industries Sequence Manufacturing SS304 2in Teardrop Exhaust Tip
45.99
Burly Brand Slammer Plus Shocks 11.5in - Black
202.47
SHW 2020 BMW X5 M 4.4L Right Rear Cross-Drilled Lightweight Brake Rotor (34208074286)
179.72
Burly Brand Control Kit 14in Ape XL
126.47
UMI Performance 82-02 GM F-Body Tubular Non-Adjustable Lower Control Arms - Red
99.99
4.2 ★★★★★
Based on 855 reviews
Sort
Product Reviews
★★★★★ 5
Nice sound deadening, self adhesive mats
Style: 18 Sqft 80 mil
These mats should work fine for my application. I’m applying it to the back sides of the hollow core doors on the closet where my HVAC is installed to reduce the “hum” from passing through. If I were sound deadening my automobile, I would probably use a heavier gage material. Overall, good product at a reasonable price.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 21, 2026
★★★★★ 5
Very good product
Style: 36 Sqft 80 mil
Easy to install, very sticky. Will buy again.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 20, 2026
★★★★★ 5
Works well and doesn’t break the bank
Style: 36 Sqft 80 mil
Awesome value for low budget wound deadening. Used this under the floor mat on my international 4300 and there is a noticeable difference in sound inside the cab.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 5, 2026
★★★★★ 5
It works
Style: 36 Sqft 80 mil
Great product
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 9, 2026
recommand products
MidWest Homes for Pets QuietTime Deluxe Tulip Dog Bed Evergreen S
74.99
Penn-Plax Aqua-Flora Living Moss Patch Aquarium Ornament 2ea/One Size
28.99
MidWest Homes for Pets Deluxe Diamond Stitch Pet Dog Bed Gray 22 in
12.99
Blue Ribbon Pet Products Glowing Mushroom Garden Ornament Long Orange & Green Small
12.99
Petmate Sky Dog Kennel Light Gray 21 in
79.99