Diesel fuel lubricates the pump, that's why the pump explodes after too many times of running low on fuel or in reality, having the pump run dry for a period of time. Gasoline vehicles don't use the fuel to lubricate, cool yes, lubricate no. A gasoline pump will now fail from running low or out of gas repeatedly, the design of the pump and cup assembly keeps the pump immersed in fuel.
I've pulled more than my share of drained fuel tanks just to find this cup still with a 1/2 quart of fuel in it even after draining the tank.
My Z06 has 2 tanks with a pump in each, I routinely drain the tank using the fuel pump and pulling the valve from the fuel rail and drain the tank to switch over to my E85 tune and back to 93. This is the shop manual way to drain the tank.