The Mishimoto transmission cooler for the 1999-2013 GMT800/GMT900 Chevrolet Silverado and GMC Sierra is a direct-fit, stacked-plate upgrade for towing, fleet, and daily-driven trucks and SUVs. Its core is 521% larger than stock with a 278% increase in frontal area, and internal plus louvered external fins maximize heat transfer at any speed. Included -6ORB quick-disconnects connect to the stock lines or swap to -6AN, an ambient-air-temp sensor relocation bracket keeps full functionality, and an adjustable mounting bracket makes for an hour-or-less install. The same cooler fits a wide range of Silverado/Sierra, Tahoe/Yukon, Suburban, Avalanche and Escalade models (see fitment).
| Type | Direct-fit transmission cooler |
| Core | Stacked-plate, internal + louvered external fins |
| vs. Stock | +521% core volume, +278% frontal area |
| Fittings | -6ORB quick-disconnect (or -6AN) |
| Included | Air-temp sensor relocation bracket, adjustable mount |
| Part Number | MMTC-GMT-99 |
| Warranty | Mishimoto Lifetime Warranty |
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2002-2014 | Cadillac | Escalade | Base |
| 2008-2014 | Cadillac | Escalade | Platinum |
| 2003-2014 | Cadillac | Escalade ESV | Base |
| 2002-2013 | Cadillac | Escalade EXT | Base |
| 2007-2013 | Chevrolet | Avalanche | LS / LT / LTZ |
| 2002-2006 | Chevrolet | Avalanche 1500 | Base / LS / LT / Z71 |
| 1999-2013 | Chevrolet | Silverado 1500 | LS / LT |
| 2007-2013 | Chevrolet | Silverado 1500 | LTZ |
| 2002-2013 | Chevrolet | Silverado 1500 | WT |
| 1999-2004 | Chevrolet | Silverado 2500 | Base / LS / LT |
| 2001-2010 | Chevrolet | Silverado 2500 HD | LS / LT / LTZ / WT |
| 2001-2006 | Chevrolet | Silverado 3500 | Base / LS / LT |
| 2007-2010 | Chevrolet | Silverado 3500 HD | LT / LTZ / WT |
| 2000-2014 | Chevrolet | Suburban 1500 | LS / LT / LTZ |
| 2000-2013 | Chevrolet | Suburban 2500 | LS / LT |
| 2000-2014 | Chevrolet | Tahoe | LS / LT / LTZ |
| 2002-2005 | GMC | Sierra 1500 | Base |
| 2002-2013 | GMC | Sierra 1500 | Denali |
| 1999-2013 | GMC | Sierra 1500 | SLE / SLT |
| 1999-2004 | GMC | Sierra 2500 | SLE / SLT |
| 2001-2010 | GMC | Sierra 2500 HD | SLE / SLT / WT |
| 2001-2006 | GMC | Sierra 3500 | SLE / SLT |
| 2007-2010 | GMC | Sierra 3500 HD | SLE / SLT / WT |
| 2000-2014 | GMC | Yukon | Denali / SLE / SLT |
| 2000-2014 | GMC | Yukon XL 1500 | Denali / SLE / SLT |
| 2000-2013 | GMC | Yukon XL 2500 | SLE / SLT |
Shipping: In-stock orders placed before 3 PM EST ship the same day, and everything else ships within 24 hours. Standard, expedited, and overnight options are available at checkout. Backordered items ship as soon as we get them back in stock. Contact us for lead times. See the full Shipping Policy.
Returns: 30-day returns on new, unused items in original packaging. See the full Refund Policy.
