Difficult To Fill

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2003 Pontiac Grand Prix, 2003 Pontiac Bonneville, 2003 Chevrolet Monte Carlo, 2003 Chevrolet Impala, and 2003 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.

Check the following items:

Fill limiter vent valve stuck closed.
EVAP canister restricted.
EVAP vent valve stuck closed.
Restricted vapor lines.
High Reid vapor pressure or high fuel temperature.
Fuel filler hose is pinched or kinked.
Ignition switch in RUN position (EVAP vent valve closed).