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If you are refering to the oil change light then here is the re-set procedure:
ENGINE OIL LIFE SYSTEM HOW TO RESET THE ENGINE OIL LIFE SYSTEM The Engine Oil Life System calculates when to change your engine oil and filter based on vehicle use. Anytime your oil is changed, reset the system so it can calculate when the next oil change is required. If a situation occurs where you change your oil prior to a "CHANGE ENGINE OIL" message in the Driver Information Center (DIC) being turned on, reset the system.After the oil has been changed, the "CHANGE ENGINE OIL" message must be reset. To reset the message, do the following:
If you're refering to the check engine light then you can re-set it by using a scantool to clear the DTCs. If you don't have a scantool then you can remove the battery cables for 2-3 minutes and it will re-set the engine computer's memory.
Remember that if there is an issue, the check engine light will come right back on. I can give you more information about your issue if you supply me the diagnostic trouble code. You can take your vehicle to Autozone and they will retrieve the codes for free.
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