I have a 2002 Grand am gt and today it started sputtering. At around 1500-2000 rpms it started sputtering and losing power. I turned it off for a while and it ran well for about 10 minutes and the same thing happened again. Any suggestions of what this may be??

Welcome to AF!!

Change the fuel filter and see what happens. This sounds like fuel starvation on due to either a bad fuel pressure regulator, clogged fuel filter or bad fuel pump especially if there is no check engine light.