My uncle just bought a new loaded Chevy 3500 duley to use as a roach coatch (canteen truck)<br />Its to replace his '99 Chevy that got set on fire.<br /><br />Its got the allison tranny and the big 502 under the hood. <br /> <br />I've been loading,unloading and rideing with him on the roach coatch this summer.<br /><br />Him and I where woundering what kind of gas milage we can expect with this thing. The factory numbers are useless to us because its going to have the big canteen body on it full of ice and stuff.<br /><br />Do any of you own one of these trucks? What kind of gas milage do you get with a load?
