yup ...... my 06 did the same thing .... its probably the fuel pump, i had mine replaced during the warrenty!
good luck, the stealership will rape you, if its not under warrenty!
in your case it sounds like the arm fell off the float!My gauge is squirrely. I think all RR gauges are. One day, on the ride home from school, I see 4 bars so I make a mental note to fill up. As I am looking at the gauge and seeing the 4 bars, it drops to three. I think "Wow, I gotta get gas." A few seconds after that thought crosses my mind, it drops to 2 bars, and before I can think "**** I'm low on gas!" it drops to the last bar and starts blinking.. all in 10 seconds. I click up to 6th and snail along to the nearest gas station. Thankfully I make it. I fill up.. TANK ONLY TAKES 2.3 GALLON!! :evil3: