The 2014 GMC SIERRA 2500HD has a steel reinforced safety cage and six standard airbags.
Sierra 2500HD features driver and front passenger air bags. Front seat-mounted side-impact air bags and head curtain side-impact air bags are also standard to provide added protection for you and outboard seated passengers. (Single rear wheel models only)
Below is the 2014 Silverado 2500HD body structure. The Sierra and the Silverdao share the same basic body structure. Also keep in mind, the Heavy Duty (HD) trucks will not share the regular duty changes in 2014 shown earlier in this post of the new 2014 Silverado 1500 Body Structure.