FASS GM Fuel Pump 2011 - 2012 Dura-Max Flow Enhancer DMAX-7002 We, at FASS Fuel Systems, have over 19 years experience in building the ?Quietest? highest quality Fuel Air Separation Systems and electric diesel fuel pumps available worldwide. It is this experience that has lead us to use a Gerotor specific fuel pump. Our success in the class 8 truck market has been above the rest. Our pumps typically last at least 700,000+ miles and our confidence is evident in our warranty. We offer warranties from 4 years on semi?s up to a lifetime warranty on pickup?s applications!