GM Service Manual Online
For 1990-2009 cars only

Condition

Causes

DEFINITION: Difficulty when refueling the vehicle.

Difficult to fill

    â€¢ Restricted vent lines
    â€¢ The evaporative emission (EVAP) vent valve is stuck closed
    â€¢ High fuel temperature
    â€¢ Condition with the internal components of the fuel tank assembly

Over fill

Condition with the internal components of the fuel tank assembly

Pre-mature shut-off of the fuel dispensing nozzle

    â€¢ The EVAP vent valve is stuck closed
    â€¢ Restricted vent lines
    â€¢ High reid vapor pressure or high fuel temperature
    â€¢ Condition with the internal components of the fuel tank assembly

Fuel Spitback

    â€¢ High reid vapor pressure or high fuel temperature
    â€¢ Condition with the internal components of the fuel tank assembly

Fuel Odor

    â€¢ Saturated EVAP canister
    â€¢ Condition with the internal components of the fuel tank assembly