AC noise

So recently I noticed that when i sit in my girlfriends 01 grandam se, after the heat is on for awhile, and turn the car off and just sit there, that I hear almost a bubbling noise coming through the vents. I assume this is normal heat dispensing or something of that sort. I was just wondering if any of you have experienced it and know exactly what it is.

well i am not an expert but you should not be able to hear the noise.....it's not normal for a grand am to do that. i have a grand am and it does not do that. I think that she should take it to the mechanic and tell them to change the fan..... i think but it has a problem....

if I go for a hard tear I can hear the coolent trickling in the rad and it gurps sometimes(when I shut it off). It always did that with my 2000 grand am and nothin is wrong with it , does it go away after a half hour or less? Im not an expert either btw.