what does it mean when my engine light comes on

Your engine light indicates a problem detected with engine performance or emissions controls. Diagnostic testing, utilizing a GM compatible diagnostic tool is needed to find out what trouble codes have been set, and to analyze other important component data to detect what is going wrong. The clues that these codes give will help a technician know where to start focusing on hands on testing to resolve the issue. Use this link to find some shops near you that can help with your concern: www.repairpal.com/repair-shops