2010 XK,Mine quit working, looks like the pump died, also the tank leaks.
No big deal as it's only a summer car, sunny and 60+ or it stays in the garage.
Easy fix ??

 

straightforward to do but access might be a PITA, haven't tried on our model car yet. i usually have to take a wheel well half apart to get at one. looks like there's an acdelco part for GM cars that also fits yours: https://www.rockauto.com/en/moreinfo...444762&jsn=825

hoses on a barbed connection often give up after a decade or so. you may want to unplug the old hose from the pump and plug it back on once or twice, get some water in there, and see if it leaks now. it's never until you fiddle with it that it decides to leak. so, you'd want to be prepared in case you have to replace that hose.