If it's a 97-up, do not bother to remove the whole liner. You can just pull the front back and get enough access to the pump. It will pop back. The pump just pushes into a grommet on the tank, so you can pull it right out. Catch the fluid if you have a lot in the tank. The front pump is the lower one, and the rear above it. Just to make things nice, they use different plugs. They also differ from the pre-97 pumps, which were held on by a threaded fitting. I just did a temporary repair on mine. A horrible design, subject to rust. Mine seized up, so I drilled out the rivets, and took the impeller off, and lubed the bearing. Put it back together with little screws. It worked for a day, and then stopped again, so I looked, and sure enough, the metal housing had rusted through and seized the back bearing too. So I just poked the hole a little bigger, lubed that as well, and taped a film can over the housing to protect it. Sprays like new again now!
I am waging an ongoing battle with "non-repairable" parts. I also milled the rivets off the rear wiper motor and repaired it. There's no good excuse for riveting these things together!