The Chevrolet Silverado ZH2 is a military, heavy-duty version of the popular Silverado pickup truck. Developed by General Motors' new military defense unit, it's powered by a next-generation Hydrogen fuel cell and advanced battery systems. Remember the Chevrolet Colorado ZH2 from 2016? GM Defense just revived the project, but it's now using the bigger Silverado truck and newer technology. Okay, so it's just a concept for now, but it could become a full-time military vehicle in the future. More importantly, the tech under the shell could find its way into the fuel-cell production car that GM promised to deliver by 2022. Until that happens, let's see what this truck is all about.