Rollover Valve: Description and Operation

Fig. 2 Rollover Valve Locations - 26 Or 34 Gallon Tank (Gas):

ROLLOVER VALVE(S)
If equipped with a 26 or 34 gallon fuel tank, two rollover valves are used. One of the valves is permanently mounted to the top of fuel tank (Fig. 2). If replacement of this particular valve is necessary, the fuel tank must be replaced. The other rollover valve is located on the top of the fuel pump module (Fig. 2). This valve may be serviced separately. If replacement is necessary, refer to the Removal/Installation.

Fig. 3 Rollover Valve Locations - 35 Gallon Tank (Gas):

If equipped with a 35 gallon fuel tank, two rollover valves are used. Both valves are permanently mounted to the top of fuel tank (Fig. 3). If replacement is necessary, the fuel tank must be replaced.

Two rollover valves are used. Fuel vapors from the fuel tank are drawn through these valves into both of the EVAP canisters by engine vacuum. A check valve is located within each of the rollover valves to prevent fuel flow from the fuel tank in the event of an accidental vehicle rollover.