Mishimoto 01-03 Chevrolet and GMC 6.6L Duramax Transmission Cooler - LB7

Ensure your transmission stays cool under demanding conditions with the Mishimoto 01-03 Chevrolet and GMC 6.6L Duramax (LB7) Transmission Cooler. Designed specifically for 2001-2003 models, this direct-fit cooler features a stacked-plate construction that offers maximum durability and superior heat dissipation. Its larger core volume and increased fin surface area—174% and 192% respectively over the stock cooler—provide enhanced cooling capacity, making it ideal for towing, fleet operations, or high-performance driving. The cooler seamlessly connects to the stock transmission lines using CNC-machined adapters, ensuring leak-free operation and straightforward installation with direct-fit brackets and custom hoses. Built to withstand harsh conditions, this Mishimoto cooler helps prevent overheating, prolonging transmission life and maintaining optimal vehicle performance. Backed by a lifetime warranty with accident protection, it offers peace of mind for as long as you own your vehicle. Whether you're hauling heavy loads or pushing your vehicle on the drag strip, this cooler is a vital upgrade for your 2001-2003 Chevy or GMC Duramax diesel truck.

Features:

• CNC-machined adapters facilitate easy connection to stock or AN fluid lines

• Stacked-plate design for maximum durability and efficient cooling

• Direct-fit installation for all 2001-2003 Chevrolet and GMC models with Allison transmission

Fitment:
2001 Chevrolet Silverado 2500 HD Base
2001 Chevrolet Silverado 2500 HD LS
2001 Chevrolet Silverado 2500 HD LT
2001 Chevrolet Silverado 3500 Base
2001 Chevrolet Silverado 3500 LS
2001 Chevrolet Silverado 3500 LT
2001 GMC Sierra 2500 HD SL
2001 GMC Sierra 2500 HD SLE
2001 GMC Sierra 2500 HD SLT
2001 GMC Sierra 3500 SL
2001 GMC Sierra 3500 SLE
2001 GMC Sierra 3500 SLT
2002 Chevrolet Silverado 2500 HD Base
2002 Chevrolet Silverado 2500 HD LS
2002 Chevrolet Silverado 2500 HD LT
2002 Chevrolet Silverado 3500 Base
2002 Chevrolet Silverado 3500 LS
2002 Chevrolet Silverado 3500 LT
2002 GMC Sierra 2500 HD Base
2002 GMC Sierra 2500 HD SL
2002 GMC Sierra 2500 HD SLE
2002 GMC Sierra 2500 HD SLT
2002 GMC Sierra 3500 Base
2002 GMC Sierra 3500 SL
2002 GMC Sierra 3500 SLE
2002 GMC Sierra 3500 SLT
2003 Chevrolet Silverado 2500 HD Base
2003 Chevrolet Silverado 2500 HD LS
2003 Chevrolet Silverado 2500 HD LT
2003 Chevrolet Silverado 3500 Base
2003 Chevrolet Silverado 3500 LS
2003 Chevrolet Silverado 3500 LT
2003 GMC Sierra 2500 HD Base
2003 GMC Sierra 2500 HD SLE
2003 GMC Sierra 2500 HD SLT
2003 GMC Sierra 2500 HD WT
2003 GMC Sierra 3500 Base
2003 GMC Sierra 3500 SLE
2003 GMC Sierra 3500 SLT