Help! New filing deadline...

Just heard that the IRS has extended the date for filing and for paying taxes from April 15 to July 15.  I already filed my taxes, and arranged for an electronic payment of taxes that I owe to be pulled from my checking account on April 15th.  With the new deadline, I would like to be able to extend the date that they pull the amount I owe to july 15th.  is there any way that I can still do that?  Will an amended return help (even though the only thing I am amemding is the date to pay)?