The Mishimoto transmission cooler for the 2011-2014 Chevrolet/GMC 6.6L Duramax LML is a direct-fit, stacked-plate upgrade that lowers fluid temperatures for towing, fleet, and daily-driven trucks running the Allison 1000 transmission. Its 13-row core delivers 41% greater core volume and 73% greater fin surface area than the stock cooler, and CNC-machined adapters connect to the factory lines (or AN lines) for leak-free flow with direct-fit brackets and tailor-made hoses. Note: fits HD LML trucks only; does not fit K2-chassis (light-duty) vehicles.
| Brand | Mishimoto |
| Type | Direct-fit transmission cooler |
| Core | 13-row stacked-plate |
| Transmission | Allison 1000 |
| vs. Stock | +41% core volume, +73% fin area |
| Fittings | CNC-machined adapters (stock line or AN) |
| Note | HD trucks only; does not fit K2 chassis |
| Warranty | Mishimoto Lifetime Warranty |
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2011-2014 | Chevrolet | Silverado 2500 HD | LT |
| 2011-2014 | Chevrolet | Silverado 2500 HD | LTZ |
| 2011-2014 | Chevrolet | Silverado 2500 HD | WT |
| 2011-2014 | Chevrolet | Silverado 3500 HD | LT |
| 2011-2014 | Chevrolet | Silverado 3500 HD | LTZ |
| 2011-2014 | Chevrolet | Silverado 3500 HD | WT |
| 2011-2014 | GMC | Sierra 2500 HD | Denali |
| 2011-2014 | GMC | Sierra 2500 HD | SLE |
| 2011-2014 | GMC | Sierra 2500 HD | SLT |
| 2011-2014 | GMC | Sierra 2500 HD | WT |
| 2011-2014 | GMC | Sierra 3500 HD | Denali |
| 2011-2014 | GMC | Sierra 3500 HD | SLE |
| 2011-2014 | GMC | Sierra 3500 HD | SLT |
| 2011-2014 | GMC | Sierra 3500 HD | WT |
