2000 Silverado 5.3L

I have a leak that drains my windshield reservoir. I think the rubber gromet that the washer motor plugs into is bad. I purchased a new gromet. Has anyone one changed these gromets or the pump. I'm more interest in the time allowed for this item. Do I need to pull the battery and the tray to get axcess.
I filled it with water and the pump works fine.