01 Z71 Silverado service engine soon

[Richardman1992]

It can range anywhere from a loose gas cap

i checked that first and the light stayed on. i made it back home to california so im not worried as much now, but my dad has an obd2 reader he'll pull out tomarrow to check the codes. i talked to him last night when i was in elko, nevada and he said it was probally time to change the oil, but it hasnt been that long since i changed it and the truck has mostly sat since i did change it