key fob batt

i have an 02 grand am, can anyone tell me what size battery the key fob takes?

Its probly the CR 2032 3V. Walmart sells them cheap and are panisonic same #.

After you replace the battery you need to press the lock+unlock at the same time near the car for seven seconds. Which should be writen on the inside of the back cover of the key fob.

thanks