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Posted

GMC 2019 Sierra 1500 Denali, Can someone tell me what the small wire on the battery positive terminal feeds?

I flat tow my truck and have a relay installed to disconnect the battery positive power and need to know if the little one needs to be disconnected also.

 

Thanks

 

 

Posted

This may be the reason that GM says to remove the - negative terminal before you flat tow.

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