Odd Fuel Pump Noise

I have noticed lately that when I let my bike sit for more than two weeks the Fuel Pump gives off a high pitched squeal for about two seconds when I turn the key on. After that everything is normal until it sits for two weeks again. I think my Fuel Pump is giving me a warning? Anyone else ever experience this. The bike is a 2006 ST3 with 31K mile on it and runs great. I have owned it since new and have never heard this before.