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Posted

I recently pulled into my driveway and the low fuel and check engine light came on at the same time. I turned off the truck, 2019 Sierra denali 6.2, and restarted. CEL still there.

Waited 2 days to drive the truck and it was gone. Filled the tank and still no CEL. Any ideas?

Posted

You can buy a cheap (like $20) scanner that plugs into your ODB II port and will connect to a smart phone and a free app, that will read engine codes.  If the condition that turned on your CEL set a code, it likely will be there.

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