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A good place to start is by checking the LT DRL relay - each DRL has a separate one. Location of the relay is in the fuses and relays section of your owners manual. If you do't have a copy of the manual, you'll find an online .pdf file of it by using "2016 acadia owner's manual" as your search keywords.
 

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(and of course, my acadia didn't come with a manual...have to get one of those.)
The online .pdf file can be printed. You'll also find the link to a service manual here on the forum. It's for model year 2014, but most info in it should pertain to your 2016.
 

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Please come back and let us know if the new relay resolves the problem.
 
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