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How to Keep Battery of 2018 GMC Yukon Charged When Flat Towing

Question:

I want to use airforce one to control brakes how do you recommend to keep battery voltage up?

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Expert Reply:

I'd recommend using the 12-v charge line from the motorhome to provide a maintenance charge to the battery of the Yukon. You can easily do this by installing a Roadmaster Charge Line Kit, part # RM-156-25. I've linked to a demonstration video for the kit.

Keep in mind that you'll still need to stop every 4 hours or so and run the vehicle for a few minutes, as the charge line kit won't have the ability to fully charge the battery.

expert reply by:
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Mike L

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