GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2005 🢒 Chevy C Cab/Chassis HD (GMT 400) 🢒 Engine 🢒 Engine Controls - 8.1L 🢒 Poor Fuel Fill Quality

Problem

Causes

Difficult to fill
    • The check valve is stuck closed.
    • The fill limiter vent valve is stuck closed.
    • The evaporative emission (EVAP) canisteris restricted.
    • The EVAP vent valve is stuck closed.
    • The vapor lines are restricted.
    • The reid vapor pressure is high or the fuel temperature is high.
    • The fuel filler hose is pinched or kinked.
    • The ignition is ON.

Over fill
    • The pressure relief valve in the fill limiter vent valve stuck open.
    • The pressure relief valve in the fill limiter vent valve is leaking.
    • The fill limiter vent valve is stuck open.
    • The fill limiter vent valve is leaking.

Premature shut-off of the fuel dispensing nozzle
    • The fill limiter vent valve stuck closed.
    • The EVAP canister restricted.
    • The EVAP vent valve stuck closed.
    • The vapor lines are restricted.
    • The reid vapor pressure is high or the fuel temperature is high.
    • The ignition switch is ON

Fuel Spitback
    • The check valve is stuck open.
    • The check valve is stuck closed.
    • The check valve is leaking.
    • The reid vapor pressure is high or the fuel temperature is high.

Liquid to EVAP canister
    • The fill limiter vent valve is stuck open.
    • The fill limiter vent valve is leaking.

Liquid leak to ground
    • The pressure relief valve in the fill limiter vent valve is stuck open, or leaking.
    • The fuel filler hoseis loose or torn.
    • The fill limiter vent valve is stuck open.

Fuel Odor
    • The pressure relief in the fuel limiter vent valveis stuck open or leaking.
    • The EVAP canisteris saturated.