oil reset instructions?

Here is a guide that helps perform this on most vehicles:

https://www.2carpros.com/articles/oil-life-reset

Below you will find the process from the manual that will provide the detail needed.

Please run through this info and let us know if you have questions. Thanks

How does one turn off the 'change oil light' on a 2002 Alero after the oil has been changed?

Hi:
With the engine off, turn the key to the run position. Next, press the gas pedal to the floor three times and wait. The light should flash indicating it's reset.

Let me know if this works for you.

Merry Christmas,
Joe