I have a 06 silverado that I am having trouble getting the O2 and CAT monitors to go ready. I have done the drive cycle numerous times, and have tried about everything suggested online. My problem goes back a few months when I had an evap code, fixed it and then cleared the codes. Ever since then I cannot get the last two monitors to ready..!! I am overdue for my NYS inspection and need one more to ready before it can be inspected. The check engine is off and the only current codes is an airbag code (B0103), and a wheel sensor malfunction code (C0035). No other codes stored or pending. What is going on with my truck? What triggers these last two monitors to run? Do I have a bad ECM? Any help is greatly appreciated.!!!