There's something to be said about installing an aftermarket fuel pump on your 2001-2010 GM 6.6L Duramax truck. Since, these 6.6L vehicles usually come only with a CP3 injection pump, having an enhanced fuel pump will lead to noticeably improved fuel economy and performance. Using your bare bones CP3 injector, the fuel that is channeled through the vacuum is subject to a number of contaminants. From fine dust/debris, water, and air, all of these have a gradual impact on your fuel performance. Using the FASS Flow Enhancer Fuel Pump, you can mitigate these problems thanks to its consistent 8 PSI fuel channeling design and reduce the workload of your factory injection pumps. If you're looking to draw every ounce of performance from your fuel, begin with the FASS Flow Enhancer Fuel Pump for the 2001-2010 GM 6.6L Duramax Trucks.