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2018 GMC Terrain SL 1.5L Turbo
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Discussion Starter · #1 ·
The lights on my (2018 GMC Terrain SL) AWD toggle switch won’t shut off when the car is completely shut off and it’s draining my battery.
Anyone else experienced this? Any suggestions on how to fix it?
 

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10,506 Posts
Maybe a stuck relay ?
 

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Still under the B to B warranty ?
 

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2018 GMC Terrain SL 1.5L Turbo
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Discussion Starter · #5 ·
Maybe a stuck relay ?
I have not taken it in for a diagnostic yet. I was hoping I could fiddle around with some fuses and see if that helps. I haven’t found the relay one or don’t even know where to start looking for that
 

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Start looking in the several fuseboxes.
 

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And, did you find any AWD relays ? Is it stuck in the closed position ?
 

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The lights on my (2018 GMC Terrain SL) AWD toggle switch won’t shut off when the car is completely shut off and it’s draining my battery.
Anyone else experienced this? Any suggestions on how to fix it?
There's no way that tiny LED is draining your battery, even over several days. Something else is going on.

Do you hear a faint whirring noise when turning AWD on or off if it's very quiet? I do on my 2020 Equinox.
 
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