The GM-47976-517 G8 Adapter is used in conjunction with the GM-47976-515 Universal Cable for engine diagnostics, utilizing the GM-47976 AFIT. The G8 Adapter plugs into the Cable and the Cable plugs into the AFIT SIDI DMU. The DMU plugs into the AFIT MCU (Main Control Unit) and links the entire AFIT system together for injector flow testing and fuel pump pressure and regulator testing.
The GM-47976 AFIT (Active Fuel Injector Tester) is a previously essential tool that can quickly and thoroughly diagnose and pinpoint the source of a vehicle's drivability issue, avoiding unnecessary replacement of fuel system components, mainly injectors that are not the actual cause of the problem.