GM Service Manual Online
For 1990-2009 cars only

Concern

Causes

DEFINITION: Difficulty when refueling the vehicle.

Difficult to fill

    • The check valve is stuck closed.
    • The fill limiter vent valve is stuck closed.
    • The evaporative emission (EVAP) canister is drain hose is blocked or restricted.
    • The EVAP canister drain line check ball is stuck closed.
    • Any restricted vapor lines or hoses
    • The EVAP canister is blocked or restricted
    • A fuel with high reid vapor pressure characteristics.
    • A high fuel temperature
    • The fuel filler hose/pipe is pinched, kinked, or blocked.

Over fill

    • The pressure relief valve in the fill limiter vent valve (FLVV) is stuck open.
    • The pressure relief valve in the FLVV is leaking.
    • The FLVV is stuck open.
    • The FLVV is leaking.

Pre-mature shut-off of the fuel dispensing nozzle

    • The fill limiter vent valve (FLVV) is stuck closed.
    • The EVAP canister is restricted.
    • The evaporative emission (EVAP) canister is drain hose is blocked or restricted.
    • The EVAP canister drain line check ball is stuck closed.
    • Any restricted fuel vapor lines
    • A fuel with high reid vapor pressure characteristics
    • A high fuel temperature

Fuel spitback

    • The check valve is stuck open.
    • The check valve is stuck closed.
    • The check valve is leaking.
    • A fuel with high reid vapor pressure characteristics.
    • A high fuel temperature

Liquid fuel in the EVAP canister

    • The fill limiter vent valve (FLVV) is stuck open.
    • The FLVV is leaking.

Liquid fuel leak

    • The pressure relief valve in the fill limiter vent valve (FLVV) is stuck open.
    • The pressure relief valve in the FLVV is leaking.
    • The fuel filler hose is loose or torn.
    • The FLVV is stuck open.

Fuel odor

    • The pressure relief valve in the fuel limiter vent valve (FLVV) is stuck open.
    • The pressure relief valve in the FLVV is leaking.
    • The EVAP canister is saturated with fuel.