This depends on Your card, some banks have arrangements with US Banks and I think You would have to pay less or nothing. You may have alook to Your banks website, searching for the information with which bank in Mexico they have contratcs.
BE CAREFUL WITH ATM IN PUERTO VALLARTA, actually there are many card cloning crimes, the criminals change the ATM keyboards against a prepared one, to save Your info as well as Your secret code.
Than they take as much money from Your card as possible.
You can withdraw money inside the banks as well, either by using internal ATMs or using other methods they offer. Look out for an HSBC, SANTANDER, BANORTE, SCOTIABANK and as well BANCOMER..