I have a 2012 356QLB. I also had issued with the pump, but it wasn't blowing fuses. It should be a GPI pump. I don't remember what the amp draw is but 7.5 sounds way too low. I need to run some stuff out to the camper anyhow and if I remember I will look at what fuse is in mine.
FYI, it is a very common issue for the impellers inside the pump to swell when they are soaked in the wonderful ethanol that is in our gas now. They sell rebuild kits that have a new type of plastic impeller that is supposed to not swell. I replaced my entire pump assembly a year ago and have not had any problems. Some people have had luck carefully sanding a bit off of the impellers. I would just get the rebuild kit, its cheap and the rebuild can be done without pulling the pump out. I would also add a 1/2" inline filter to the line from the tank to the pump. It is a metal tank and while the inside of mine still is clean, I would hate to pump some rust or trash into things like dirt bikes and generators.
I also have found that if I turn on the pump switch without the valve open, it will pressure up and then stop. Once it stops, even opening the valve doesn't usually re-start it. I have just learned to open the valve then hit the switch.
2006 Chevrolet 2500HD CCSB Duramax/Allison
Demco 18k Autoslide
2012 Puma Unleashed 356QLB toy hauler
Toys - CRF250X, CRF250R, CRF450R, CRF150F, TTR230, TRX250EX