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

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I'm using these again for the 3rd time and they're great as always. My 3rd is still having some issues at night time with bed wetting, and as they get older the bigger the mess, so these truly hold up to a full bladder. And they don't smell by morning like some diaper brands. I'm usually against pull ups, but these are great for up and down ease of use and that added protection when it comes to potty training. I love the bigger size inclusion for larger children which we struggle with for comfort compared to other brands.

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Reviewed in the United States on February 14, 2026

Verified Purchase

Betrose95

Bozeman, US

★★★★★ 5

Been using for a long time

Love BB Company products.

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Reviewed in the United States on May 15, 2026

Verified Purchase

Yolimar Carrero

Lowell, US

★★★★★ 5

Feliz

Desde que lo comencé a tomar cero calambres y ya duermo placentero

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Reviewed in the United States on April 30, 2026

Verified Purchase

Kayt

San Leandro, US

★★★★★ 5

Healthy Sea plant magnesium

I’ve been researching magnesium and ran across the benefits of magnesium from sea plants. Since many people lack the proper amounts of magnesium this type of magnesium seems healthier than magnesium from the earth.

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Reviewed in the United States on March 3, 2026

SC/K5

Pawtucket, US

★★★★★ 3

You need magnesium

It helps with so many things, and most of us don’t get enough. Do your research, and make your choice. This is a good starter option, but that is just my opinion.

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Reviewed in the United States on August 18, 2025