The ones I was trying to unclip were unclipped by hand, but they didn't look like the lines in the pictures. 2 of them we used what is called an AC/Fuel remover tool.

Great picture, I wish I had seen that a couple of weeks ago when I had to replace the fuel pump in my Jimmy. That would have saved me a lot of grief.

There'* also another type of connector that'* all black with a ring of black plastic used on the vent connections. Supposedly, if you press the ring in it will release the two little tabs and allow you to slide the connection off. That worked on one of them, the rest I had to pop open with a tiny screwdriver.

is there a clip on the plastic fuel pump end? i have the pump in but the line keeps popping off, i dont see a clip on the hose.

there has got to be a clip on either the sending unit or sometimes it stays with the hose depending on what type you are working on. what is your yr/make/model?