I have a 2020 blazer LT and it seems the rear window wiper washer line is clogged. When I hit the button, the pump will blow the line off of the pump. Is this something that’s happened before to anybody? What’s the solution?

A 2020?

A lot of people on here have model years 2005 and below. Try chat gpt to diagnose the solution. Better than googling one by one.

You could try pulling the line off of the nozzle at the back and see if that allows the pump to push fluid out. If it does, then the nozzle is likely clogged and a quick shot of compressed air backwards through the nozzle with the line disconnected should free whatever is clogging it up.

I would also inspect the line at the pump to make sure that it doesn't have any kind of defect that might be reducing its hold onto the nipple of the pump. If there is enough slack in the line, you could try cutting a little bit of the line off to get a fresh end for a better hold although a vehicle that is only 5 years old shouldn't have any problems with the line going bad...