This 2012 GMC Sierra 3500HD SLE combines heavy-duty capability with practical comfort, delivering the performance and reliability you need for work or towing while maintaining a refined daily driving experience.

- Duramax 6.6L V8 Turbodiesel engine with 397 horsepower and 765 lb-ft of torque
- Allison 1000 6-speed automatic transmission with electronic engine grade braking and tow/haul mode
- Four-wheel drive with electronic shift transfer case
- Heavy-duty handling and trailering suspension package
- SiriusXM satellite radio with AM/FM stereo and CD player
- Remote keyless entry and power door locks
- Heated power door mirrors with turn signal indicators
- Leather-wrapped steering wheel with tilt adjustment
- Premium cloth seat trim with driver-side manual lumbar support
- Split folding rear seat for versatile cargo space
- Auto-dimming inside rear-view mirror
- Air conditioning and fully automatic headlights
- 4-wheel disc brakes with ABS
- OnStar Directions & Connections emergency communication system

The Sierra 3500HD chassis provides the structural integrity and load capacity expected from a professional-grade truck. Under the hood, the Duramax diesel delivers substantial torque at low RPM, making it well-suited for demanding work. The Allison transmission features electronically controlled shifting and multiple towing modes to handle trailers and equipment confidently.

Inside the cab, you'll find thoughtful details that enhance usability. The 40/20/40 split-bench front seat with manual lumbar adjustment accommodates different body types comfortably. Climate control keeps the cabin comfortable in all seasons, while the heated mirrors improve visibility during winter months. The comprehensive audio system includes satellite radio for entertainment during long drives.

The suspension and braking systems are engineered for the demands of heavy hauling. Independent front suspension, dual anti-roll bars, and four-wheel disc brakes with ABS provide stable handling and controlled stopping power. The 3.73 rear axle ratio balances power delivery with efficiency.

Safety features include dual front impact airbags, a security system with panic alarm, and OnStar emergency communication. Fully automatic headlights and variably intermittent wipers adapt to changing conditions, reducing driver workload.

This Sierra 3500HD is ready to work hard and serve reliably. Whether you need a capable work truck or a dependable towing vehicle, this model delivers the diesel performance and built-in features that professionals trust.