Join Date: May 2015
Location: Montgomery, AL.
I would get out of the truck, close the door and not worry the batteries for even a month of sitting.
My spare 04 1500 (Old and Busted) sits for months at a time with an Interstate blem battery in it. Usually starts no problem. My 48 hp John Deere sits outside for months in the winter without running and starts fine.
2004 2500HD LB7, Crew Cab LT, 4 x 4, 252,000 mi, CTS2, MBRP exhaust dual outlet, no cat, PowerStop Brake Kit, B & W Turn over ball, Air Bags, CamLocker toolbox, 265/75-16 Cooper Discoverer AT3, 3rd set of injectors at 205K mi. 4th set inj Oct 2019, Lincoln Diesel 45% over SAC inj. New head gaskets & studs. New Turbo.