B6.6 L Duramax Diesel Block Heater Cord 2001-2015 Chevy GMC Silverado 2500 3500 ReviewbP PP 6.6 L Duramax Diesel Block Heater Cord 2001-2015 Chevy GMC Silverado 2500 3500 PFits All 2001-2015 Duramax 6.6L Diesel Engines in any vehiclePHigh Quality Rubber for long life and flexability in the cold.