* Driving style: Aggressive driving consumes fuel faster.
* Terrain: Driving uphill or in stop-and-go traffic uses more fuel.
* Vehicle condition: A poorly maintained vehicle might use more fuel.
* Specific fuel tank size: The 2005 Chevy Express vans came with different fuel tank sizes (likely 26 or 34 gallons).
Generally, the low fuel light illuminates when approximately 1-3 gallons of fuel remain. Plan on having no more than 1-2 gallons left when the light comes on. It's best to fill up as soon as the light appears to avoid running out of gas.