Stalling Buick Century

I have a Buick Century 2000 that has recently had various minor repairs done (including a new battery). The car has been relatively problem-free and has 83k miles on it. Now when I start it after it has been resting all night it starts and then after about 30 seconds makes a funny noise, shakes, and stalls. It restarts with no problem. A friend had suggested a problem with a sensor or fuel filter. What do you think it is?

I have a Buick Century 2000 that has recently had various minor repairs done (including a new battery). The car has been relatively problem-free and has 83k miles on it. Now when I start it after it has been resting all night it starts and then after about 30 seconds makes a funny noise, shakes, and stalls. It restarts with no problem. A friend had suggested a problem with a sensor or fuel filter. What do you think it is?

You say it restarts no problem. Do you mean though that after restarting you also don't have the same problem after 30 seconds that time?

yes, it has stalled every morning after sitting all night but I start and stop it several times during the day and it acts normal.