did my express fuel tank come with a fuel bladder

What is your question?

i had a new fuel pump installed at a shop ,it leaked shop won t stand behind their work. took it to gm dealer they said the fuel bladder was not sealing the pump to the tank and was causeing the leak, it would be an extra $60 to replace it . this is the second pump i ve replaced never had any one say i had a bad fuel bladder. did my tank even come with a bladder in it? bill