Injector Return Line Cap – CH-50377



Used for diagnosis of the fuel system in the 6.6L Duramax diesel. The engine now features piezo activated injectors. The CH-50377 plugs the injector fuel line to seal it off and allow isolation of each injector so a fuel volume test can be performed and compared to the service specification standard. Each injector line is sequentially disconnected and plugged with the CH-50377. The volume check is run using the graduated cylinders in previously essential J-45873-100 Volume Test Set.


2010 G Van, 2011 C/K Truck with Duramax 6.6L Diesel & piezo injectors

Additional information

Weight 2 lbs
Dimensions 8 × 8 × 8 in