Description Engine Block Heater for 2001-2016 6.6L GM / Chevrolet Duramax Diesels Reference # 12657629 / 12643197 / 97214984 Features: Designed to warm engine block and fluids, speed up heating of cabin, and increase life of engine components during harsh weather conditions Designed to allow a quick and easy start up for the vehicle in cold weather conditions Extensively tested to OE specifications to ensure superior performance and long service life Direct fitment for easy installation Fitment Information: 2001-2016 Chevrolet Silverado 2500/3500 2007 Chevrolet Silverado 2500/3500 Classic 2006-2016 Chevrolet Express 2500/3500 2009-2016 Chevrolet Express 4500 2001-2016 GMC Sierra 2500/3500 2007 GMC Sierra 2500/3500 Classic 2006-2016 GMC Savana 2500/3500 2009-2010 GMC Savana 4500
