2011-2012 GMC Savana 3500 FLEX Dual Rear Wheels; Drive Ratio 3.73 & 4.10; 12'300 lb Gross Vehicle Weight (GVW); Required Hardware: 370-47040. 2010 GMC Savana 3500 FLEX Dual Rear Wheels; 12'300 lb Gross Vehicle Weight (GVW); Required Hardware: 370-47040.
