Dieseling, Run-On. GMC Truck GMC C Pickup

For 1990-2009 cars only

Makes 🢒 GMC_Truck 🢒 2000 🢒 GMC C Pickup - 2WD 🢒 Engine 🢒 Engine Controls - 7.4L 🢒 Dieseling, Run-On

Checks

Action

Definition: The engine continues to run when the key is turned OFF, but runs very roughly. If the engine runs smoothly, check the ignition switch and adjustment.

Preliminary Check

Refer to Symptoms .

Fuel System Checks

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

•	Inspect the fuel injectors for leakage.

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