Just got back from Costco, wanted to buy a couple batteries for my truck, but I can't figure out if they have them or not. It says to use 2 27 group batteries, 750 cranking amps well the only ones they have says starting/deep cycle marine batteries. Does anyone here have costco batteries for there truck and what do they say on them. Everyone at costco was just scratching there heads? Need my truck to deliver some Christmas gifts to Vegas on Sunday. Oo.