<p> Trustworthy and worry-free, this 2025 GMC Sierra 3500HD Denali Ultimate makes room for the whole team. Trailer Tire Pressure Monitor Sensors includes set of 4 sensors. Sensor functionality requires (UET) In-vehicle Trailering App to be ordered with the vehicle and installed by the factory. Sensors will be shipped loose with the truck and will need to be installed on trailer by customer. System is capable of monitoring up to 6 wheels. Additional or replacement sensors are available through GM Accessories, Trailer Side Blind Zone Alert, Trailer Camera Provisions and trailer viewing software, Tire Pressure Monitoring System auto learn, includes Tire Fill Alert (does not apply to spare tire), 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. </p> <p><strong> Know the GMC Sierra 3500HD is Protecting Your Most Precious Cargo </strong><br /> StabiliTrak, stability control system with Proactive Roll Avoidance and traction control includes electronic trailer sway control and hill start assist, Seat Belt Adjustable Guide Loops, front row only, Safety Alert Seat, Rear seat reminder, Rear Cross Traffic Alert, OnStar Services capable (See onstar.com for details and limitations. Services vary by model. Service plan required.), OnStar Basics (OnStar Fleet Basics for Fleet) Drive confidently with core OnStar services including remote commands, built-in voice assistance, real-time traffic and navigation, and Automatic Crash Response to help if you're in need. (OnStar Basics includes remote commands, Navigation, Voice Assistance, and Automatic Crash Response, for eligible vehicles with compatible software. For MY25 vehicles, OnStar Basics is standard