The Mishimoto transmission cooler line kit for the 2001-2005 Chevrolet/GMC 6.6L Duramax LB7/LLY routes transmission fluid to the cooler with high-performance PTFE lines wrapped in a high-strength nylon braid. The PTFE inner liner is highly oil- and heat-resistant, while the braid prevents expansion under pressure and resists abrasion. Capped with -10AN fittings for a secure, leak-free connection, the lines carry a 2,000 psi working pressure and 6,000 psi burst rating — ideal alongside a performance transmission cooler.
| Brand | Mishimoto |
| Type | Transmission cooler line kit |
| Line | PTFE inner liner, nylon-braid outer |
| Fittings | -10AN |
| Pressure | 2,000 psi working / 6,000 psi burst |
| Warranty | Mishimoto Lifetime Warranty |
Documents: Installation Instructions (PDF)
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2001-2005 | Chevrolet | Silverado 2500 HD | Base |
| 2001-2005 | Chevrolet | Silverado 2500 HD | LS |
| 2001-2005 | Chevrolet | Silverado 2500 HD | LT |
| 2004-2005 | Chevrolet | Silverado 2500 HD | WT |
| 2001-2005 | Chevrolet | Silverado 3500 | Base |
| 2001-2005 | Chevrolet | Silverado 3500 | LS |
| 2001-2005 | Chevrolet | Silverado 3500 | LT |
| 2004 | Chevrolet | Silverado 3500 | WT |
| 2002-2005 | GMC | Sierra 2500 HD | Base |
| 2001-2002 | GMC | Sierra 2500 HD | SL |
| 2001-2005 | GMC | Sierra 2500 HD | SLE |
| 2001-2005 | GMC | Sierra 2500 HD | SLT |
| 2003-2005 | GMC | Sierra 2500 HD | WT |
| 2002-2005 | GMC | Sierra 3500 | Base |
| 2001-2002 | GMC | Sierra 3500 | SL |
| 2001-2005 | GMC | Sierra 3500 | SLE |
| 2001-2005 | GMC | Sierra 3500 | SLT |
| 2004-2005 | GMC | Sierra 3500 | WT |
