Check Engine Codes

[JohnnyRPM]

My H2 has been showing the check engine light for 4 days now. Runs perfectly and still gets about 12.4 mpg. Gas cap is tight and I've definitely got three diagnostic cycles under me. Haven't disconnected the battery yet to try to reset it but honestly I'd like to know what it is before I reset it.

I know on older GM cars you could short out two terminals on the diagnostic connector with a paperclip and the check engine light would flash the code that it's throwing instead of using a scan-tool. Can this be accomplished on the H2? Trying to avoid buying a scan tool or programmer and I'd love to avoid the hassle of a dealer visit if it's a sensor of some sort I could replace myself.

Thanks,

-John