Owners of 2007 GM 2500 and 3500 series diesel pickups can go that extra mile by installing a larger replacement fuel tank system. Transfer Flow, Inc., has introduced a 45-gallon replacement fuel tank system for crew cab and extended cab pickups with a 6-foot bed, and a 56-gallon replacement fuel tank for crew cab and extended cab pickups with 8-foot beds. Transfer Flow's replacement fuel tanks are made from 12 and 14-gauge aluminized steel for superior rust resistance and strength, and are baffled for extra support.