3274045|Water Pump for 2008 GMC Sierra 3500 HD 6.6L - WP3221XP93. Ensure your 2008 GMC Sierra 3500 HD 6.6L runs smoothly with this high-quality Water Pump. Designed for precise fitment and engineered for durability, it's the ideal choice for engine maintenance or a full rebuild.. 2008 GMC Sierra 3500 HD 6.6L Engine Water Pump - WP3221XP93 Also fits the following vehicles: 2007 GMC Sierra 3500 Classic 6.6L Engine Water Pump, 2007 GMC Sierra 3500 HD 6.6L Engine Water Pump, 2008 GMC Sierra 3500 HD 6.6L Engine Water Pump, 2009 GMC Sierra 3500 HD 6.6L Engine Water Pump, 2010 GMC Sierra 3500 HD 6.6L Engine Water Pump, 2011 GMC Sierra 3500 HD 6.6L Engine Water Pump, 2012 GMC Sierra 3500 HD 6.6L Engine Water Pump, 2013 GMC Sierra 3500 HD 6.6L Engine Water Pump, 2014 GMC Sierra 3500 HD 6.6L Engine Water Pump, 2015 GMC Sierra 3500 HD 6.6L Engine Water Pump, 2016 GMC Sierra 3500 HD 6.6L Engine Water Pump, 2006 GMC Sierra 3500 6.6L Engine Water Pump