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30-day refund / replacement
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
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Availability:
In Stock.
Arrives
Tuesday, Nov 3
At a glance
- Condition
- New
- Model
- VT-W-HC-0621-N1
- Weight
- 9.5 oz
- Exterior
- Painted
Features 5
- Vehicle FitmentCompatible with 2014 2015 2016 2017 2018 Chevy Silverado 1500/Suburban/Tahoe, GMC Sierra 1500/Yukon, and Cadillac Escalade equipped with 4.3L, 5.3L, or 6.2L V8 engines. Please verify your vehicle runs the 6-speed 6L80 automatic transmission before purchase
- Optimized Transmission Cooling PerformanceAllows continuous ATF flow through the cooler, helping reduce operating temperatures by 2040F during towing, hauling, or high-load drivingsupporting more stable transmission performance and reducing heat-related wear over time
- Heavy-Duty ConstructionOur 6l80 thermal bypass valve is constructed from precision-machined, corrosion-resistant billet aluminum. Rigorously tested for high-temperature resistance and pressure fluctuations to guarantee leak-free, long-lasting reliability in harsh environments
- Easy to InstallDirect bolt-on replacement - works with factory fluid lines No modifications required - saves time & hassle Great for DIY mechanics & professionals alike
- Buy with ConfidenceValtecs provides a 1-year warranty on our meticulously crafted products. Each item undergoes a strict quality inspection to ensure reliable performance. Should you have any concerns, feel free to contact us we will reply and address your issues within 24 hours
Specs 8
| Manufacturer | Valtecs |
|---|---|
| Brand | Valtecs |
| Model | ATF Thermal Bypass Valve |
| Item Weight | 9.5 ounces |
| Package Dimensions | 5.51 x 3.74 x 1.97 inches |
| Item model number | VT-W-HC-0621-N1 |
| Exterior | Painted |
| Manufacturer Part Number | VT-W-HC-0621-N1 |
No specs match.
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Tuesday, Nov 3
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Finally Running Cool Under Load
I installed this Valtecs thermal bypass valve on my 2018 Suburban 1500 with the 5.3L and 6L80 transmission after I started noticing transmission temps creeping higher than I liked while towing the camper and hauling loads on summer weekends. At $48.99, it’s one of the simplest and most cost-effective upgrades I’ve done to protect the drivetrain. Installation was a breeze — maybe 20 minutes in the driveway with basic tools. It’s a true direct bolt-on replacement for the factory thermal bypass valve; no custom lines, no modifications, and everything lined up perfectly with the factory fittings. The precision-machined billet aluminum body feels noticeably more robust than the stock plastic unit, and I really like the built-in magnetic plug that catches fine metal particles — a small detail that adds real peace of mind for transmission longevity. Since swapping it in, I’ve seen more stable ATF temperatures during highway towing and stop-and-go traffic. The valve keeps fluid circulating through the external cooler continuously rather than bypassing it when the fluid is still cool, and that seems to help the 6L80 stay in its happy zone even under load. While I haven’t run a scientific A/B test, the temp gauge tells the story: I’m no longer watching that needle climb toward the “nervous” zone on long grades. Comparing it to the big-name competitors that charge $75 or more for the same function, this Valtecs unit is a solid value. It’s built tough, installs headache-free, and comes with a 1-year warranty. If you own a 2014–2018 GM truck or SUV with the 6L80 and you tow, haul, or just want to help your transmission live a longer life, this is cheap insurance. Highly recommended.
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Reviewed in the United States on August 30, 2026 by iChad
Smart built-in magnetic filtration feature
Really appreciate the built-in magnetic plug that catches metal particles to protect the transmission. It’s a direct bolt-on replacement with no modifications needed, perfect for anyone who does their own garage work. The heavy-duty billet aluminum build looks solid and corrosion-resistant from the product photos.
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Reviewed in the United States on June 30, 2026 by Leigh McLaughlin
Great upgrade for 6L80 transmissions
This billet aluminum bypass valve looks nicely machined. Direct bolt-on design means installation shouldn’t be too complicated for DIY work.
Reviewed in the United States on September 8, 2026 by Bonnie