If the noise it made was like something hitting the squirrel cage blades that move the air, you should open the hood, look under the windshield wiper on the passenger side for the two little clips that are the door to the cabin filter. TAke out the filter, if one is installed, and look down in with a flashlight to see if something has gotten down where the fan is to block it from rotating. You might try turning the blades to see if they rotate freely.
If it made noise that was like bearings your probably have to replace the fan motor. Parts are available cheap and then there are more expensive ones from a dealer or rockauto.com or gmpartsdirect.com or your dealer.
Two screws on the black plastic above the passenger's knees take off the plastic panel.
There are three screws holding on the fan motor above the passenger's toes. Someone said that pulling the carpet out of the way gives a little more room to get the fan motor and squirrel cage out.
It could be blower motor control module that the power goes through to control the motor speed. But since you said it was making noise, that's low on the list.
You can try taking off the hush panel and bumping the motor with the key and AC unit turned on and see if the fan starts working. The commutators/brushes wear out and quit making contact as one form of failure.