[CONRAD II]

Taz, thanks for the reply. I think if I just push the onstar button they should be able to tell me why the check engine light came on in the first place. I'm assuming its and air/fuel ratio problem but there's no way for me to tell for sure. When the gauge did go off into the red zone and started blinking it was under little or no boost and I was off the gas. The air/fuel gauge read normal once I gave it a little throttle. Don't know if that helps diagnose anything? What are some possible problems that would lead to this? Have you had any issues with your charger? Again, thanks for your help.