Low Washer Fluid

Recently my washer fluid light came on on my 00 yukon. After filling still says low washer fluid after every start up. Ive looked in manual no reset or anything like that any help.. Also ive asked before but ill ask again about my gas guage. After fill up or actually anytime low fuel light on guage on e. Now if there was a float sticking when it broke loose it should slowly go upto actual level. It does not it goes at the blink of an eye. Ive notice sometimes when i push brake it will go from e to f instantly. Also sometimes when a door is opened it changes. It acts like a power surge or something causes to change.. Please anyone think. Ive checked for the tank unit guage fuel pump assembly 850.00 bucks and with my luck that wont be it.Any ideas???????? DAVE

On the fuel guage, I would say it was the sending unit. I found this one for a lot cheaper. I didnt realize it was one unit.
http://www.1aauto.com/1A/fuel_pump/GMC/Yukon/1AFPU01102/153806&ovchn=OTHER&ovcpn=MSN&ovcrn=&ovtac=CMP

Cant remember for sure but it seems like my yukon had a float you could see when u open washer fluid fill cap. One of my cars either does or one in past. But anyway if yukon does have the float to guage fluid level i am not seeing it. So if anyone fills there washer fluid check to see if theres a float at top when full...