Where is the airbag module on a 2000 Cavalier and how can you reset the airbag light after replacing the bags?

Here's a site that will explain everything you need to know about airbag lights and resetting the system.

http://www.airbagsolutions.com/

This website gives you the procedure for diagnosing and resetting airbag lights. See if your car is listed here.

http://www.airbagsolutions.com/vehicles_list.aspx

On most vehicles, the airbag light should come on for @6 seconds, and then go off if the system is working properly. If there is a fault or a problem in the system, the light will remain illuminated, or flash continuously. If the airbag light does not work properly, some vehicles have an audible tone that sounds indicating a problem with the airbag light system. When the light is on (or the tone is sounding), the airbag will NOT deploy, even in an accident.

The flashing light on your car is telling the answer you need. On some vehicles, the light is flashing a two digit code. Once you know the code, you can most likely repair it yourself. There are fairly easy procedures that most people are capable of repairing.

http://www.airbagsolutions.com/light.aspx

Some vehicle manufacturers accommodate systems without a scanner (like Toyota, Lexus, Nissan, Infinity, Honda, Acura, Ford, Lincoln, Mazda & Mercury) and some require a scan tool.

Check out these websites also for more info on airbag systems and the light.

http://blog.airbagsolutions.com/archive/2007/11/18/why-is-my-airbag-light-on.what-should-i-do.aspx

http://www.airbagsolutions.com/resources.aspx

http://blog.airbagsolutions.com/

Also, you may want to check out this site for information on researching your own vehicle for factory recalls!!!

http://www.airbagsolutions.com/nhtsa.aspx

Under Passenger front seat. Must replace, no reset.(DERM unit)

Yes however sometimes they put it under the center middle console. And yes you can reset it. Don't spend hundreds of dollars on replacing. I googled a company called www.myairbags.com and they reset my original Airbag / SRS Computer Module for $55 and shipped it back to me for free. It worked and the my SRS system is effective.