What is the washer fluid route to the tailgate? I get fluid running out just below the tailgate behind the rear drivers side wheel well, but see no hose from there. It use to work!

 

On my 1999, I think it comes in from the top through a flexible rubber tube with other stuff. You might have to take the interior panel off to access it. You might find a one-way valve for the washer fluid has failed or only that the hose has fallen off.

 

I scrolled down a little until I saw "Related Topics," and that led me to this https://blazerforum.com/forum/2nd-ge...leaking-33593/