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.