Engine Controls - 6.6L (Introduction): Maintenance GMC Cab & Chassis Sierra 3500

Fuel Filter Life Reset

This message will appear when a reset is performed either by using the steering wheel controls or following manual procedure.

1. Reset the fuel filter monitor.
2. For vehicles with steering wheel controls, press and hold the select button for 5 seconds while the FUEL FILTER LIFE message is displayed. This message will appear on the driver information center (DIC) for ten seconds.
3. For vehicles without steering wheel controls, do the following: Without pressing the pedals, turn the ignition key to the ON position without starting the engine. Wait 5 seconds. Completely press the brake and the accelerator pedals simultaneously and hold for 10 seconds. The system is now reset. Turn the ignition key OFF.
4. The next time the engine is started, the message will no longer be displayed. ALWAYS reset the FUEL FILTER LIFE system after a fuel filter change.

Water-in-Fuel Draining Procedure

1. Attach a small piece of hose to the drain cock onto the water-in-fuel sensor.
2. Place an approved fuel-resistant container under the fuel filter.
3. Open the drain cock 3 or 4 turns or until the water contaminated fuel seeps from the drain cock.
4. Operate the priming pump until only diesel fuel is visible. Allow the pump to return upward between pushes.
5. Tighten the drain cock.
6. Remove the container and hose.