How do you reset service engine soon light 2003 Pontiac grand am?

To reset the "Service Engine Soon" light on a 2003 Pontiac Grand Am, you can use an OBD-II scanner to clear the diagnostic trouble codes (DTCs) that triggered the light. Alternatively, you can disconnect the negative battery terminal for about 10-15 minutes, then reconnect it, which may reset the light. However, if the underlying issue hasn't been resolved, the light will likely turn back on. Always ensure to address any mechanical problems before resetting the light to avoid potential damage.