Mishimoto transmission cooler for 2014–2019 Silverado/Sierra 1500 V8 — 14-row stacked-plate direct-fit (Silver)

The Mishimoto MMTC-K2-14 is a direct-fit, high-capacity transmission cooler engineered to lower automatic transmission temperatures for 2014–2019 Chevrolet Silverado and GMC Sierra 1500 V8 trucks.

If you use a Silverado or Sierra 1500 V8 for towing, hauling, performance driving, or heavy daily use, the factory transmission cooler can be overwhelmed by heat. Mishimoto designed the MMTC-K2-14 to bolt into the OEM cooling circuit and provide significantly more cooling surface and extra fluid capacity, helping keep transmission temperatures down during demanding conditions. The kit comes complete with CNC-machined adapter lines, mounting brackets, SAE J1532-rated hoses, and a removable thermal bypass delete for immediate cooling performance.

How much extra cooling capacity does this cooler add?

The MMTC-K2-14 uses a 14-row stacked-plate core that measures 27" x 6" x 1.25", creating over 3,000 square inches of cooling surface. It also increases transmission fluid capacity by approximately 0.65 quarts, which helps stabilize temperatures under load and reduces thermal spikes.

• 14-row stacked-plate core for high heat rejection
• 27" × 6" × 1.25" physical core dimensions
• +0.65 quarts transmission fluid capacity
• Over 3,000 in² of cooling surface area

Will this install on my 2014–2019 Silverado or Sierra without major modifications?

Yes — the MMTC-K2-14 is built as a direct-fit kit for 2014–2019 Silverado and Sierra 1500 V8 trucks and installs inline with the factory cooling system. The kit includes pre-installed CNC-machined mounting brackets and aluminum adapter lines that connect to OEM ports; minor drilling is required for adapter line routing and a stick-on drilling template is provided.

• Direct-fit design for clean, OEM-style appearance
• CNC-machined aluminum brackets and adapter lines included
• Stick-on drilling template and full installation instructions provided
• Minor drilling required for adapter line installation

Does this cooler work with my transmission and other GM models?

The Mishimoto kit is compatible with GM 6L90 and 8L90 automatic transmissions and fits a range of vehicles that share the same cooling ports. Besides Silverado and Sierra, select Cadillac Escalade, Chevrolet Suburban, Tahoe, GMC Yukon, and Yukon XL models may be compatible — verify fitment against your vehicle and transmission type before purchase.

• Compatible with 6L90 and 8L90 transmissions
• Fits select Escalade, Suburban, Tahoe, Yukon, and Yukon XL models
• Confirm year, engine, and transmission match before ordering

What hardware and accessories are included in the kit?

The MMTC-K2-14 ships as a complete bolt-on solution with everything needed for installation and reliable operation. Mishimoto provides high-pressure hoses rated for transmission fluid, a removable thermal bypass delete for continuous flow, and a bracket to relocate the ambient air temperature sensor for 2014 models.

• SAE J1532-rated high-pressure transmission hoses
• Removable thermal bypass valve delete for immediate flow
• Ambient air temperature sensor relocation bracket (2014 models)
• Mounting hardware, drilling template, and instructions included

Who is this for? The MMTC-K2-14 is aimed at owners of 2014–2019 Chevrolet Silverado and GMC Sierra 1500 V8 trucks who tow, haul, or push their trucks in hot climates and want a dependable, OEM-style transmission cooling upgrade. It’s also a solid choice for performance enthusiasts and work-truck operators seeking to reduce transmission heat, extend component life, and improve thermal stability during sustained heavy use. Before installation, confirm vehicle year, engine, and transmission compatibility and review the included instructions for the small drilling step required for adapter line routing.