The Hickok Diesel Fuel Injection Tester (DFIT), No. WAE45468, can electronically test and diagnose fuel injection systems on GM Duramax diesel injection systems electronically in 15 minutes, or less. This factory-level tool works on 2001-2010 model years to check pumps, regulators, injectors and fuel flow/return, without opening the system. Previously available only to OEs, aftermarket technicians can now repair vehicles that previously had to go back to dealers for repair. This tool can also be utilized by dealerships as a cost-effective solution in place of high-cost OEM tools that may not see enough service to justify the cost to the dealer.