Last night i drave 50 miles two and from school and parked my truck for the night. When i got up this mornin to got to work my SES light was on and i have no i dea why. It started with a few more cranks than normal but it ran fine. All the guages look fine and i dont know enough do diagnose it. My friend has a Diablo sport that im gonna hook up to when he gets home to try to find whats goin on. I have no clue in the mean time. What could just show up agter it was fine last night?