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2018 sierra 5.3 service emissions system text message


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26 minutes ago, Supreme Pizza said:

I would check the OBD2 codes at the local auto parts store. (Its free).

 

You probably have a stored or pending OBD2 code on bank one or bank two.

 

If it says sensor #1 - fix it.

If it says sensor #2 - you can safely ignore it.

 

(oxygen sensors)

I am going to put a scanner on tomorrow and check it. It has a pretty rough idle now all of the sudden

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