service engine soon light on 1997 Chevrolet 1500 Pickup

Please tell me how to "reset" the service engine soon light on my truck.

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2 answers
Your service engine soon light is on because of a trouble code generated by your emission control system:

You most likely need a repair.
take the truck to a autozone cause they will check it for free and if you already fixed it then ask the guy to reset it for you with their scanner.