Pickup needs head gasket repaired. 2015 chevy silverado ls 2500hd. 4x4. 6.6 duramax diesel. Crew cab 8ft flatbed. 255k miles. Air bags, overload springs. Weather tech floor mats Truck seems to run and drive fine without overheating. It is bubbling in coolant tank. Aside frome issue at hand truck is in great condition inside and out for its age and miles. $14,000 call four02 two00 zero720.