Disclaimer:
The Manufacturer’s Suggested Retail Price excludes tax, title, license, dealer fees and optional equipment. Dealer sets final price.
1Dealer Discount applied to everyone
The 2026 GMC Sierra 3500HD Pro In-Transit is built for serious work, combining exceptional capability with the reliability you expect from a heavy-duty truck.
- 6.6L V8 Duramax Diesel engine with 470 hp and 975 lb-ft of torque
- 10-Speed Automatic transmission with 4WD
- Snow Plow Prep Package for winter readiness
- Convenience Package for everyday usability
- Suspension Package engineered for hauling and towing
- Electric Rear-Window Defogger
- 220 Amp Alternator for high electrical demands
- GMC Infotainment System with Apple CarPlay and Android Auto
- Lane Departure Warning System and Forward Collision Alert
- Auto High-beam Headlights with IntelliBeam technology
- Upfitter Switch Kit with 5 switches for customization
- SiriusXM Trial Subscription included
- Dual rear wheels for enhanced stability and load capacity
- 2-Speed Electronic Shift Transfer Case
- OnStar Services capable for emergency communication
This Pro In-Transit model starts with White exterior paint and deep-tinted glass for visibility and comfort. The truck rides on 17-inch painted steel wheels and features high-visibility molded black outside mirrors with power adjustment. Chrome bumpers and a chrome grille with flat black insert bars give the front a professional appearance.
Inside, you'll find a front 40/20/40 split-bench seat with vinyl trim and a 4-way manual driver seat adjuster. The cabin includes power windows, power steering, remote keyless entry, and a tilt steering wheel. Climate control is handled by air conditioning, while the fully automatic headlights with delay-off function add convenience. An auto-dimming inside rear-view mirror helps reduce glare on longer drives.
Safety is prioritized with dual front impact airbags, dual front side impact airbags, and an overhead airbag system. The truck includes Electronic Stability Control, traction control, and brake assist as standard. Lane Departure Warning and Forward Collision Alert provide additional active safety technology.
The Duramax diesel engine benefits from an engine block heater and is B20-diesel compatible, making it versatile for various fuel options. A 40-gallon rear fuel tank supports extended operating range. The heavy-duty 80 amp-hour battery and 220 amp alternator ensure sufficient power for demanding applications.
Technology features include the premium GMC Infotainment System with wireless phone projection, Apple CarPlay and Android Auto compatibility, plus an AM/FM radio with SiriusXM trial subscription. A 6-speaker audio system delivers clear sound throughout the cab.
This 2026 Sierra 3500HD Pro In-Transit represents a truck designed to work hard and perform reliably. Contact us today to schedule a test drive and experience its capability firsthand. Not all customers may qualify for all rebates listed, see dealer for details. Price includes: $1000 - Buick & GMC Consumer Cash Program. Exp. 08/31/2026 Price includes $225 in dealer added accessories.