Apparently the 09 Cambria doesn't have one. Putting in fuel today, the pump clicks off then I pull the nozzle vapor seal back and put in another 7 gallons. Poor design.
In response to your comments, it appears that the tank is so close to the actual fuel cap that there is no neck, just a rubber baffle. In order for the fuel nozzle to
stay in the tank on automatic fueling the end of the nozzle is inside the tank. It clicks off and then it's a slow go after that. It's not a big deal but i am going to
investigate the vapor/vent line and see what's up.