I have a Northstar 8.5 Arrow mounted on my 2015 Chevy 2500, 4X4, long bed, single rear axle. A friend told me that when the truck motor is running that it is supplying power to the camper's on boar...
As far as I know all pickups have that option for last 100 years ;) Some models require inserting fuse, some need big plug installation, so check the manual. On my Fords I don't need to start the engine. Just turn the ignition on. I used the option when running compressor on my equipment trailer. The small trailer battery for break-away brakes was too small to power compressor at 90 psi.