Conditions for Running the DTC

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

DTC P0500 is not set.
The engine is running.
The vehicle speed is 0 km/h (0 mph).
The primary fuel level is less than 25 liters (6.6 gallons).
The secondary fuel level is between 3-10 liters (0.8-2.6 gallons).
The above conditions are met for 20 seconds before the fuel transfer pump is commanded ON.
The fuel transfer pump is commanded ON for 120 seconds.