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Repair guides and support for cars, trucks, and SUVs manufactured by GMC.

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My 2009 GMC Acadia headlights, turn signals, and windows won't work.

I have a 2009 gmc Acadia. I always have my light control in the auto position. I never change that. Tonight as I'm driving, the headlights went out and the right turn signal stopped working and my windows don't work at all. Also my key couldnt come out of the ignition. I got a message on the dash saying automatic light control off. As I'm driving. What could be the cause and what do I need to check or do?

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Hi @karlie1127

For that many systems to go wrong all at the same time it would be something common to all of them.

Check if the BCM (body control module) fuse in the passenger compartment, instrument panel side fuse box is OK.

If it is OK, it may be a problem with the BCM (example only) itself or perhaps a loose data link connector (example only) connection to the module.

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Karlie Wade sarà eternamente grato.
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