Description: Recommended for upgrading to a trailering system. Helps prevent transmission overheating. Recommended for Trailer Towing Upgrade with 4 Speed Automatic Transmission (with RPO Code M30- M70). Transmission Cooler Package prevents overheating and provides extra cooling for your automatic transmission fluid when hauling or towing heavy loads. Includes Transmission Oil Cooler- Pipe- Hose- Clip- and Bolts.