Rear axle, 3.73 ratio (Requires (L8T) 6.6L V8 gas engine.)
Recovery hooks, front, frame-mounted, black
Steering, Recirculating Ball with smart flow power steering system
Transmission, Allison 10-Speed automatic
Safety
Airbags, dual-stage frontal airbags for driver and front outboard passenger; Seat-mounted side-impact airbags for driver and front outboard passenger; Head-curtain airbags for front and rear outboard seating positions; Includes front outboard Passenger Sensing System for frontal outboard passenger airbag (Always use seat belts and child restraints. Children are safer when properly secured in a rear seat in the appropriate child restraint. See the Owner's Manual for more information.)
Following Distance Indicator (Included and only available with (PDI) Sierra HD Pro Safety.)
Forward Collision Alert (Included and only available with (PDI) Sierra HD Pro Safety.)
Front Pedestrian Braking (Included and only available with (PDI) Sierra HD Pro Safety.)
Lane Departure Warning (Included and only available with (PDI) Sierra HD Pro Safety.)
OnStar and GMC connected services capable (Terms and limitations apply. See onstar.com or dealer for details.)
Teen Driver a configurable feature that lets you activate customizable vehicle settings associated with a key fob, to help encourage safe driving behavior. It can limit certain available vehicle features, and it prevents certain safety systems from being turned off. An in-vehicle report card gives you information on driving habits and helps you to continue to coach your new driver