New 2026 GMC Sierra 2500HD AT4 For Sale CONCORD, CA

New 2026 GMC Sierra 2500HD AT4 4WD for Sale in Concord, CAFind heavy-duty diesel strength and off-road-ready refinement in this new 2026 GMC Sierra 2500HD AT4 Crew Cab 4WD at Lehmers Concord GMC. Its 6.6L Duramax Turbo-Diesel V8 and Allison 10-speed automatic transmission deliver confident power for demanding work and recreational travel. The AT4 pairs four-wheel-drive capability with a spacious cabin and distinctive rugged styling.FEATURE HIGHLIGHTS- Duramax Diesel Power: The 6.6L Turbo-Diesel V8 delivers 470 horsepower and 975 lb-ft of torque for responsive heavy-duty performance.- Allison Transmission: A 10-speed automatic helps put diesel power to work smoothly on highways and demanding grades.- AT4 Four-Wheel Drive: Off-road suspension, Rancho shocks, skid plates and Hill Descent Control support travel beyond pavement.- Premium Cabin: AT4's Jet Black interior with Kalahari accents creates a distinctive blend of rugged character and comfort.- Digital Command Center: A 13.4-inch infotainment touchscreen and 12.3-inch driver information display make key controls and vehicle information easy to access.- Connected Driving: Google built-in and wireless Apple CarPlay and Android Auto help with navigation, calls and entertainment.- Driver Assistance: Forward Collision Alert, Automatic Emergency Braking and Lane Departure Warning support awareness on busy roads.- Pickup Versatility: GMC's MultiPro Tailgate provides multiple loading and access configurations for gear, tools and supplies.The Sierra 2500HD AT4 is built for East Bay drivers whose schedules alternate between work sites, highway travel and weekends outdoors. The high-torque Duramax offers a useful foundation for hauling and trailering, while the AT4's off-road-oriented equipment brings added confidence on rough access roads. Its Crew Cab offers room for passengers without giving up the everyday utility of a heavy-duty pickup.Inside, the Sierra HD prioritizes easy-to-use technology and long-distance comfort. Broad digital displays put media, vehicle information and navigation close at hand. The versatile cargo bed handles equipment for projects or recreation, and the MultiPro Tailgate helps when loading or reaching into the bed. This truck balances useful working features with the polished feel expected from an AT4.For shoppers comparing new diesel 4WD Crew Cab trucks in the San Francisco Bay Area, this 2026 GMC Sierra 2500HD AT4 combines Duramax V8 torque, an Allison automatic and purpose-built off-road capability. Ask for VIN 1GT4UPEY8TF397052.Contact Lehmers Concord GMC to confirm availability or schedule a test drive.Looking for a new 2026 GMC Sierra 2500HD near Richmond, Dublin or Vacaville? Visit Lehmers Concord GMC, a convenient Bay Area GMC destination for drivers near Hanlees Hilltop GMC, Dublin Buick GMC and GMC of Vacaville.¿Prefiere atencion en espanol? Contacte a Lehmers Concord GMC para obtener informacion de nuestros vehiculos, o hacer un cita con el departamento que los atendera en espanol.Family owned and operated for five generations, Lehmers Concord GMC has served Concord and the San Francisco-Oakland Bay Area since 1928. We proudly assist GMC shoppers from Walnut Creek, Pleasant Hill, Martinez, Richmond, Dublin, Vacaville and surrounding communities.May not represent actual vehicle. (Options, colors, trim and body style may vary) The Manufacturer's Suggested Retail Price excludes tax, title, license, dealer charges. Price includes: $1000 - Buick & GMC Consumer Cash Program. Exp. 11/02/2026