Yes, normal. Start it (if auto stop/start), put it on neutral and shut off. Then pull two fuses so the BCM does not drain the battery.
This is in the Owner's Manual under Dinghy Towing.
I installed a by-pass switch for the fuses, so it's real easy & quick to set to tow.
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2004 Holiday Rambler Imperial 40PKD, Cummins ISL 400
2019 Buick Envision AWD
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