
2025 GMC Sierra 2500HD AT4 4WD Duramax Diesel X31 Off-Road One Owner
Take on any challenge in luxury with this 2025 GMC Sierra 2500HD AT4. Powered by the legendary 6.6L Duramax Turbo Diesel and paired with the Allison® 10-speed automatic transmission, this premium heavy-duty truck delivers exceptional towing capability, advanced off-road performance, and first-class comfort. Finished in stunning Onyx Black, this Sierra AT4 is built to stand out both on and off the pavement.
Premier Certified 2025 GMC Sierra 2500HD AT4 4WD is powered by the 6.6L Duramax V8 Turbo Diesel and paired with the Allison® 10-speed automatic transmission, offering incredible torque, heavy-duty capability, and refined performance.
Finished in Onyx Black, this CARFAX One-Owner Sierra is loaded with the AT4 Preferred Equipment Group 4SB, X31 Off-Road Package, premium technology, luxury interior appointments, and advanced trailering features.
Key Features
Premier Certified
CARFAX One-Owner
6.6L Duramax Turbo Diesel V8
Allison® 10-Speed Automatic Transmission
4WD
AT4 Premium Off-Road Package
X31 Off-Road Package
Preferred Equipment Group 4SB
Bose Premium 7-Speaker Audio System
HD Surround Vision Camera System
Bed View Camera with Trailer Camera Provisions
Trailer Viewing Software
In-Vehicle Trailering System App
Hitch Guidance with Hitch View
Trailer Side Blind Zone Alert
Wireless Apple CarPlay & Android Auto
Wireless Phone Charging
Heated & Ventilated Front Seats
Heated Rear Outboard Seats
Perforated Leather-Appointed Seating with Kalahari Accents
Remote Vehicle Start
Spray-On GMC Bedliner
LED Cargo Area Lighting
Rear Cross Traffic Alert
Safety Alert Seat
Front & Rear Park Assist
Rain-Sensing Windshield Wipers
120-Volt Bed Power Outlet
120-Volt Interior Power Outlet
20" High Gloss Black Aluminum Wheels
Gloss Black AT4 Grille
Push Button Start
Performance & Capability
Allison® 10-Speed Automatic Transmission
Legendary 6.6L Duramax Turbo Diesel
2-Speed Active Transfer Case
X31 Off-Road Suspension
Hill Descent Control
3.42 Rear Axle Ratio
Integrated Advanced Trailering Technology
HD Surround Vision with Trailer Camera Compatibility
Heavy-Duty Towing & Payload Capability
Built for Towing, Ranching, Construction, and Off-Road Adventures
Why Buyers Love It
The 2025 GMC Sierra 2500HD AT4 combines heavy-duty diesel capability with premium luxury and advanced technology. The proven 6.6L Duramax Diesel and Allison® 10-speed transmission provide exceptional towing confidence, while the AT4 and X31 Off-Road Package deliver superior capability beyond the pavement. Inside, you'll enjoy heated and ventilated leather seats, Bose premium audio, HD Surround Vision, wireless smartphone integration, and a full suite of advanced trailering technology. With its CARFAX One-Owner history and Premier Certified coverage, this Sierra is an outstanding choice for anyone seeking a premium heavy-duty truck that works as hard as it looks.
Available now at Premier Ford of Lamesa, proudly serving Lamesa, Midland, Odessa, Big Spring, Brownfield, and surrounding West Texas communities.