Pontiac Repair: 2004 Grand Am Fuel Tank, vent valve, vent system

Question
i bought my Pontiac new.  i have been having trouble filling the gas tank.  when i go to fill it up it clicks off as if the tank is full.  it appears to be worse in the winter.  I live on a gravel road so i try to clean the undercarriage as much as possible, which doesn't really seem to help. I just figured that it might have something to do with the dust and vents in the fuel tank.  what should i do?  Thank you for you advice in advance. :)

Answer
Hi
There are a few things it could be, most should be checked by your local mechanic or dealership.
Here is the list I came up with from GM;

Difficult to fill
    •  Fuel fill limiter vent valve stuck closed

   •  Evaporative emission (EVAP) canister restricted

   •  EVAP vent valve stuck closed

   •  Hose between canister and canister vent solenoid twisted or kinked if applicable

   •  High fuel temperature

   •  Fuel filler hose is kinked

   •  Faulty dispensing nozzle

   •  Ignition switch ON, vent valve closed

Over fill
    •  Fill limiter vent valve stuck open or leaking

   •  Fuel inlet check valve stuck open

Pre-mature shut-off of the fuel dispensing nozzle occurs immediately after engaging dispensing nozzle, tank empty
    •  Restricted vapor lines or fuel fill pipe

   •  High fuel temperature

   •  Inlet check valve at tank stuck closed, fill pipe full of fuel

   •  Fuel tank full, gage not accurate

Pre-mature shut-off of the fuel dispensing nozzle, more than 1/8 of tank capacity dispensed
    •  Kinked, pinched or plugged lines in fuel tank vent system

   •  EVAP vent valve stuck closed or restricted

   •  EVAP canister restricted

   •  Fuel limiting vent valve stuck closed or obstruction at top of fuel tank

Fuel Spitback
    •  Restricted EVAP canister

   •  High fuel temperature

   •  Ignition switch ON, EVAP vent valve closed

Hope this helps
Pawl