Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 12 - Jul 17
For Your Every Summer RSVP, with Code: SUMMER15
Description
Mishimoto 2017+ GMC 6.6L Duramax L5P Transmission Thermal Bypass Valve KitThe Allison transmission is the backbone of your L5P Duramax. It's responsible for transmitting large quantities of torque from your V8 diesel powerplant. This torque generates a lot of heat, and if that heat isn't dissipated, it can destroy your transmission. The transmission cooler does a good job of keeping trans fluid temperatures in check, but only if the fluid can reach it. The stock cooling system of the Allison 1000 transmission utilizes an in
The Allison transmission is the backbone of your L5P Duramax. It's responsible for transmitting large quantities of torque from your V8 diesel powerplant. This torque generates a lot of heat, and if that heat isn't dissipated, it can destroy your transmission. The transmission cooler does a good job of keeping trans fluid temperatures in check, but only if the fluid can reach it. The stock cooling system of the Allison 1000 transmission utilizes an in-line thermal bypass valve that controls fluid flow to the transmission cooler. The purpose of this valve is to prevent transmission fluid from flowing to the cooler until it reaches operating temperature. The thermostat inside this valve is prone to failure, however, and when that happens, the fluid never flows to the cooler, and the transmission can overheat. That's why Mishimoto has developed a thermal bypass valve upgrade for your 2017-2019 Chevrolet/GMC 6.6L Duramax. Our CNC-machined aluminum thermal bypass valve not only looks better than the stock unit, but it performs better too. This Mishimoto thermal bypass valve kit includes a fully serviceable thermostat for fast warm-up in cold climates. This kit also includes a thermostat bypass that can be installed to provide constant cooling in warm climates or for use in extreme driving/towing conditions. The Mishimoto thermal bypass valve features strategically machined internal passages, providing improved flow over the stock valve for more effective cooling. In addition, cooling fins machined into the valve body adds even more heat dissipation. This 2017-2019 Chevrolet/GMC 6.6L Duramax L5P Thermal Bypass Valve Kit is built to last a lifetime with a durable black anodized finish and our Mishimoto Lifetime Warranty.This Part Fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2017-2019 | Chevrolet | Silverado 2500 HD | High Country |
| 2017-2019 | Chevrolet | Silverado 2500 HD | LT |
| 2017-2019 | Chevrolet | Silverado 2500 HD | LTZ |
| 2017-2019 | Chevrolet | Silverado 2500 HD | WT |
| 2017-2019 | Chevrolet | Silverado 3500 HD | High Country |
| 2017-2019 | Chevrolet | Silverado 3500 HD | LT |
| 2017-2019 | Chevrolet | Silverado 3500 HD | LTZ |
| 2017-2019 | Chevrolet | Silverado 3500 HD | WT |
| 2017-2019 | GMC | Sierra 2500 HD | Base |
| 2017-2019 | GMC | Sierra 2500 HD | Denali |
| 2017-2019 | GMC | Sierra 2500 HD | SLE |
| 2017-2019 | GMC | Sierra 2500 HD | SLT |
| 2017-2019 | GMC | Sierra 3500 HD | Base |
| 2017-2019 | GMC | Sierra 3500 HD | Denali |
| 2017-2019 | GMC | Sierra 3500 HD | SLE |
| 2017-2019 | GMC | Sierra 3500 HD | SLT |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
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
4.9 ★★★★★
Based on 2311 reviews
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Product Reviews
★★★★★ 5
Great cart for the price
Color: Gold(2 Tier)
This is a very nice low cost cart. Assembly was reasonable and it is appropriately sturdy for the price. Photos and size info are accurate!
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Reviewed in the United States on August 30, 2025
★★★★★ 5
Great and Practical Organizer — Keeps My Sink Area Neat
Color: Black
I bought this HOKEMOM kitchen sink organizer to keep my sink area tidy, and it has worked perfectly. It’s compact yet spacious enough to hold my sponge, dish soap, brushes, and other kitchen essentials. The drip tray is especially useful because it prevents water from pooling and keeps everything dry and clean. The material feels sturdy and durable, and it doesn’t look like it will rust easily with daily use. Since I placed it on my sink, the whole area looks much more organized and clutter-free. Simple product, but extremely functional!
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Reviewed in the United States on December 9, 2025
★★★★★ 5
Game changer
Color: Black
This kitchen sink organizer has been a game changer for my countertop! It’s sturdy, well-made, and fits perfectly next to my sink. The multiple compartments are ideal for keeping sponges, scrub brushes, dish soap, and even scrub pads neatly organized and within reach. I was able to clear up so much clutter around my sink area it looks so much cleaner and more functional now.
I love the rust-proof design and the drainage holes on the bottom that keep everything dry instead of sitting in water.
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Reviewed in the United States on January 3, 2026
★★★★★ 5
Perfect Size and Highly Practical
Color: Black
This sink organizer with sponge and brush holder is the size I was looking for. The non-slip, drain-free base keeps everything dry and in place. Having my sponges and brushes within easy reach makes the sink area much more organized, and it fits perfectly without taking up too much space I like the quality. It has genuinely made my kitchen feel tidier and more efficient.
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Reviewed in the United States on December 4, 2025
★★★★★ 5
Very good quality
Color: Black
It is easy to assemble and works great with my soap, sponge and scrub brush. And it stands stable on the counter beside the faucet. I think the materials used are of good quality and should last a long time.
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Reviewed in the United States on April 13, 2026
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