Diesel Laptops has developed a free VIN decoder for commercial trucks. It will display year, make, model, engine make/model, air brake system, and a bunch of other data. It is available for free at the following sites:
Website: http://dieselvin.com/
Google Play: https://play.google.com/store/apps/details?id=com.disel.vindecoder
Apple iTunes: https://apps.apple.com/us/app/diesel-vin/id1454244763
