GM Service Manual Online
For 1990-2009 cars only

Condition

Causes

Difficult to fill

    • Fill limiter vent valve stuck closed
    • Evaporative emission (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 ON (vent valve closed)

Over fill

    • Pressure relief valve is stuck open or leaking
    • Fill limiter vent valve stuck open or leaking

Pre-mature shut-off of the fuel dispensing nozzle

    • 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
    • Ignition switch ON (EVAP vent valve closed)

Fuel Spitback

    • Restricted EVAP canister
    • High reid vapor pressure or high fuel temperature
    • Ignition switch ON (EVAP vent valve closed)

Liquid to EVAP canister.

    • Fill limiter vent valve stuck open or leaking
    • Over filled fuel tank (cramming during fueling)

Liquid leak to ground

    • Pressure relief valve is stuck open, or leaking
    • Fuel filler pipe loose or ruptured
    • Leaking fuel tank

Fuel Odor

    • Pressure relief valve stuck open, or leaking
    • Saturated EVAP canister
    • Seepage from fuel lank