No this is a 16 so it "had" def, if you know what I mean.Spot on BBJ,further short trips are hard on diesel engines,one needs to get the engine up to operating temps to avoid mechanical issues down the road, also GM recommends using they're or like diesel fuel conditioner every so often when truck sits idle for long periods.
BBJ,take care of this truck,your lucky it was one of the last not using Def fluid.