Wait to Start Light Diesel Engine

If your vehicle has the DURAMAX 6600, you will have glow plugs. If your vehicle has the DURAMAX 7800, you will have glow plugs and an inlet heater. If your vehicle has a Caterpillar engine, you will have an inlet heater.

The light in the center of the instrument panel will come on when the inlet heater is on and the ignition key is in RUN.

Wait until the indicator light turns off before turning the ignition key to START.