Depending on OEM packages, you my need to add a 40 amp fuse in the fuse block that's under the hood, as not all GM's came with the fuse installed. Mine all had the Full Towing Package and all came with the fuse installed, but for one reason or another I did blow the fuse on one Truck and had to replace said blown fuse to get a functional charge line.
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Michelle & Ann
2018 Chevy 3500HD High Country DRW 4X4 Crew Cab w/Duramax/Allison, Formally 2010 Montana 2955RL, Now Loaded 2016 SOB, Mor/ryde IS, Disc Brakes & Pin Box, Comfort Ride Hitch, Sailun 17.5 Tires.
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