Although a scantool is definitely a good tool to have, most regular scantools can not read airbag codes or clear them. Ive got a bluepoint(snapon) MicroscanPro which set me back $400. it reads engine codes, body codes, manufacture (some) specific codes, and some ABS codes but nothing for airbag codes. My snapon dealer told me that lower end units will not be capable of reading airbag codes. Your best bet is to try and find a friend with a high end scantool, or become good friends with someone at a gm dealer that wouldnt charge you to hook the aveo up on their tecII (or whatever GM uses)