Meet the 2025 GMC Sierra 3500HD AT4, a heavy-duty truck engineered for those who demand capability without compromise. This Thunderstorm Gray powerhouse combines advanced technology, genuine comfort, and the rugged performance you need for work or adventure.
- Duramax 6.6L V8 Turbodiesel engine delivering 470 hp and 975 lb-ft of torque
- 10-Speed Automatic transmission with 4WD for confident traction in any condition
- AT4 Premium Plus Package with power sunroof and premium technology features
- Gooseneck/5th Wheel Prep Package for seamless towing integration
- Bose Premium 7-Speaker Sound System with SiriusXM 360L trial subscription
- GMC Premium 13.4" Diagonal Information Display and 15" Multicolor Head-Up Display
- Heated and ventilated leather front seats with 10-way power adjustment and lumbar support
- HD Surround Vision with Bed View Camera and dual trailer camera provisions
- Automatic Emergency Braking, Lane Departure Warning, and Rear Cross Traffic Alert
- Heated steering wheel and premium front floor liners with removable carpet inserts
- Off-Road High Clearance Step and X31 Off-Road Package for superior capability
- Dual 220-amp primary and 170-amp auxiliary alternators for heavy electrical demands
- Engine Block Heater, High Idle Switch, and Exhaust Brake for diesel performance
- Remote Vehicle Starter System and wireless phone projection for convenience
- 20" High Gloss Black aluminum wheels with Spray-On Pickup Bedliner featuring GMC logo
This Sierra 3500HD AT4 arrives as a certified pre-owned vehicle, backed by GMC's commitment to quality and reliability. Every system has been thoroughly inspected and conditioned to meet our exacting standards, giving you confidence in your investment and peace of mind for years to come.
The AT4 trim distinguishes itself with genuine off-road capability paired with luxurious appointments. The advanced suspension system, combined with the available X31 Off-Road Package, ensures this truck handles challenging terrain while maintaining the refined ride quality you appreciate during daily driving. Whether navigating job sites or mountain passes, you control the environment rather than letting it control you.
Inside, the cabin reflects careful attention to driver-focused design. The heated steering wheel, advanced climate control with front dual-zone air conditioning, and memory seat functions adapt to your preferences. The 15" Head-Up Display keeps critical information in your line of sight, while the Technology Package integrates your digital life seamlessly with wireless phone projection and multiple USB charging ports throughout the cabin.
The gooseneck hitch platform and fifth-wheel prep package transform this truck into a serious towing platform. Whether you're hauling a gooseneck trailer or fifth-wheel RV, the integrated hitch camera provisions and trailer side blind zone alert take the guesswork out of maneuvering heavy loads. The dual alternators ensure your electrical system handles demanding accessories and equipment without compromise.
This 2025 Sierra 3500HD AT4 represents everything GMC built this truck to be: uncompromising performance, genuine luxury, and the capability to handle whatever you ask of it. We invite you to experience it firsthand in our showroom.
* The advertised price does not include sales tax, vehicle registration fees, other fees required by law, finance charges and any documentation charges. A negotiable administration fee, up to $115, may be added to the price of the vehicle.
* Images, prices, and options shown, including vehicle color, trim, options, pricing and other specifications are subject to availability, incentive offerings, current pricing and credit worthiness.
