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

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

Marsoni

M251S

$147.95

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 TBV UPC: 840197710616 Mishimoto 2017+ Chevrolet GMC 6. 6L Duramax L5P Transmission Thermal Bypass Valve Kit Replace the failure prone stock thermal bypass valve in your 2017+ Chevrolet Silverado and GMC Sierra HD trucks with L5P Duramax diesel. This Mishimoto kit ensures transmission fluid reaches the cooler for effective heat management during towing and heavy loads. CNC machined aluminum design delivers reliable performance with faster

Easy Shipping

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

Country Zip/Postal Code

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

The squeaky ball lights up the faces of my dog shelter furiends, they love to fetch and chew the ball to make it squeaky. I have been buying these balls for about a year now. They don’t last long with some of the dogs, but the joy is worth the price. Lately some of the balls do not squeak right out of the box but many of the balls are fine. Returning the box doesn’t make sense because I used some already so I thought I would comment, dropping one star so far.

WAS THIS REVIEW HELPFUL?YesReportShare

Reviewed in the United States on July 21, 2025