Dieseling, Run-On. GMC Truck GMC K Sierra

For 1990-2009 cars only

Makes 🢒 GMC_Truck 🢒 2000 🢒 GMC K Sierra - 4WD 🢒 Engine 🢒 Engine Controls - 4.3L 🢒 Dieseling, Run-On

Checks

Action

DEFINITON: The engine continues to run when you turn the key OFF, but runs very roughly. If the engine runs smoothly, check the ignition switch and adjustment.

Preliminary Check

Refer to Symptoms .

Fuel System Checks

•	Check the evaporative emission (EVAP) system and fuel tank venting.

•	Check the fuel injectors for leakage.

•	Perform a fuel system diagnosis. Refer to Fuel System Diagnosis .