Prutomr Aluminum Transmission Thermal Bypass Valve for GM 6L80 (2014–2018) — Billet Body, Magnet

Prutomr Premium Aluminum Transmission Fluid Thermal Bypass Valve is an OE-fit replacement that forces all fluid through the cooler, lowers operating temperatures, and traps metal debris for reliable 6L80 transmission performance.

Designed for GM vehicles equipped with the 6L80 transmission (model years 2014–2018), this billet-aluminum bypass valve replaces the factory unit with a durable, corrosion-resistant component. It redirects 100% of transmission fluid through the cooler under high-load conditions to reduce heat, and its integrated neodymium magnet captures metallic particles before they circulate. The valve ships with installation instructions, retains OEM O-rings and gaskets, and is machined for an exact OE-style fit in Chevrolet, GMC, and Cadillac trucks and SUVs.

How does this valve lower transmission temperatures?

When the transmission is under stress—towing, climbing, or idling in traffic—the Prutomr valve ensures full fluid flow through the external cooler, rather than bypassing it. That maximizes heat exchange, helping the transmission run closer to optimal temperatures during sustained loads. Proper temperature control reduces wear on seals and clutch packs without altering factory cooling plumbing.

• Forces 100% of fluid through the cooler during high-heat conditions
• Billet aluminum body improves heat tolerance and dissipation
• Fits directly in place of the OEM valve—no extra coolant lines

Will this unit protect the transmission from metal debris?

Yes—Prutomr integrates a strong neodymium magnet into the bypass valve to capture ferrous particles before they circulate back into the transmission. Trapping metallic debris helps prevent accelerated wear on gearsets and clutches and keeps the fluid cleaner between service intervals. The magnet is accessible during routine maintenance for inspection and cleaning.

• Built-in neodymium magnet captures metal shavings and filings
• Removable-access design for easy cleaning at service intervals
• Reduces risk of abrasive damage to internal transmission components

How difficult is installation, and what comes in the box?

Installation is straightforward and typically takes about 20 minutes using common hand tools. The valve reuses the vehicle’s original O-rings and gaskets, so you won't need additional aftermarket seals unless the originals are worn. Prutomr includes step-by-step instructions and a complimentary pair of gloves to simplify the swap.

• Approximate install time: 20 minutes with basic tools
• Uses OEM O-rings and gaskets—no extra seal kit required
• Includes printed instructions and gloves for a quick, clean install

Which vehicles and engines is this bypass valve compatible with?

This valve is a direct OEM-style replacement for GM trucks and SUVs fitted with the 6L80 automatic transmission from 2014 to 2018. Confirm fitment by matching transmission code and year, especially for full-size Chevrolet, GMC, and Cadillac models. It was machined to factory mounting dimensions for a precise, leak-free fit.

• Chevrolet Silverado 1500: 4.3L, 5.3L, 6.2L (2014–2018)
• GMC Sierra 1500: 4.3L, 5.3L, 6.2L (2014–2018)
• Chevrolet Tahoe/Suburban, GMC Yukon, Cadillac Escalade, Cadillac CT6 (select 2014–2018 5.3L/6.2L)

Who is this for: The Prutomr Premium Thermal Bypass Valve is aimed at owners of 2014–2018 GM trucks and SUVs with the 6L80 transmission who tow, haul, or otherwise subject their drivetrains to heavy-duty use. It’s also a smart upgrade for technicians and DIYers seeking an OE-fit, long-lasting alternative to the factory valve that improves cooling effectiveness and captures metallic contaminants without modifying factory plumbing.