My daughter's '06 H3 will turn over but won't start. No CIL or codes that I could gather from the truck. The battery light is on so my first thought is the alternator may have bit the dust. It was running fine the day before. The truck has about 160K on it right now. I will check the alternator but has anyone run into certain relays or sensors that are prone to crap out that would restrict ignition.

 

Search GM Passlock if the little red lock symbol comes on the dash when it fails to start.