Mishimoto Performance Transmission Cooler for 1999-2014 GM Silverado, Sierra, Suburban, Tahoe, and Escalade (MMTC-GMT-99)

Fits select 1999-2014 Cadillac Escalade, Chevrolet Silverado, Suburban, Tahoe, Avalanche, and GMC Sierra (1500/2500/3500).

Excessive heat is the primary enemy of any automatic transmission. Whether your GMT800 or GMT900 platform truck is a dedicated tow rig, a fleet workhorse, or a daily driver, maintaining stable fluid temperatures is critical for drivetrain longevity. The Mishimoto Performance Transmission Cooler is engineered to provide massive cooling overhead compared to the restrictive factory unit.

This cooler utilizes a durable stacked-plate design with internal fins and louvered external fins to optimize heat transfer. With a massive core volume 521% larger than stock and a 278% increase in frontal surface area, it significantly improves cooling capacity during heavy towing or low-speed off-road use. The kit includes precision-machined -6ORB quick-disconnects that mate directly to factory lines or can be removed to accommodate custom -6AN lines.

• 521% increase in core volume over the factory cooler for superior fluid capacity
• 278% increase in frontal surface area for improved heat dissipation at any speed
• Robust stacked-plate construction for maximum durability on or off-road
• Includes -6ORB quick-disconnect fittings compatible with factory transmission lines
• Supplied ambient air temperature sensor relocation bracket maintains full truck functionality
• Adjustable mounting bracket allows for a straightforward installation in under an hour
• Backed by the Mishimoto Lifetime Warranty with Accident Protection
• Manufacturer Part Number: MMTC-GMT-99