+3 Front & Rear Thermostat Kit For 2001-21 6.6l Duramax LB7 LLY LBZ LMM LML L5P KB-6.6l-FRTK $46.95 In stock Quantity: 1 Add to Bag Product Details Front & Rear Thermostat Kit for 2001-2021 6.6l Duramax Engines. Includes: 1x Thermostat Housing Outlet Seal 1x Front Thermostat 85°/185°F, Replaces: 97241129, 131-1631x Rear Thermostat 82°C/180°F, Replaces: 97241130, 131-131 Fits: 6.6l Duramax LB7 LLY LBZ LMM LML L5P 2001-2021 Chevy GMC 2500/3500 Save this product for later Favorite