GM Service Manual Online
For 1990-2009 cars only

Problem

Causes

Difficult to fill

    â€¢ Check valve stuck closed
    â€¢ Fill limiter vent valve stuck closed
    â€¢ Evaporative emission (EVAP) canister restricted
    â€¢ EVAP vent valve stuck closed
    â€¢ Restricted vapor lines
    â€¢ High reid vapor pressure or high fuel temperature
    â€¢ Fuel filler hose is pinched or kinked
    â€¢ Ignition ON

Over fill

    â€¢ Pressure relief valve in fill limiter vent valve stuck open
    â€¢ Pressure relief valve in fill limiter vent valve is leaking
    â€¢ Fill limiter vent valve stuck open
    â€¢ Fill limiter vent valve is leaking

Premature shut-off of the fuel dispensing nozzle

    â€¢ Fill limiter vent valve stuck closed
    â€¢ EVAP canister restricted
    â€¢ EVAP vent valve stuck closed
    â€¢ Restricted vapor lines
    â€¢ High reid vapor pressure or high fuel temperature
    â€¢ Ignition switch ON

Fuel Spitback

    â€¢ Check valve stuck open
    â€¢ Check valve stuck closed
    â€¢ Check valve leaking
    â€¢ High reid vapor pressure or high fuel temperature

Liquid to EVAP canister

    â€¢ Fill limiter vent valve stuck open
    â€¢ Fill limiter vent valve leaking

Liquid leak to ground

    â€¢ Pressure relief valve in fill limiter vent valve stuck open, or leaking
    â€¢ Fuel filler hose loose or torn
    â€¢ Fill limiter vent valve stuck open

Fuel Odor

    â€¢ Pressure relief in fuel limiter vent valve stuck open, or leaking
    â€¢ Saturated EVAP canister