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

New 2026 GMC Sierra 2500 HD AT4 4WD for Sale in Concord, CAThis new 2026 GMC Sierra 2500 HD AT4 Crew Cab 4WD in Summit White brings Duramax diesel strength, off-road capability and premium comfort to Lehmers Concord GMC. Its 6.6L Duramax Turbo-Diesel V8 produces 470 horsepower and 975 lb-ft of torque and is paired with an Allison 10-speed automatic transmission. Built for demanding towing, job-site use and weekend recreation, this heavy-duty truck combines serious capability with a refined Jet Black interior featuring Kalahari accents.FEATURE HIGHLIGHTS• 6.6L Duramax Turbo-Diesel V8 with 470 horsepower and 975 lb-ft of torque• Allison 10-speed automatic transmission and four-wheel drive• X31 Off-Road Package with Rancho shocks, skid plates and Hill Descent Control• Gooseneck/5th-Wheel Prep Package with bed-mounted seven-pin trailer connector• ProGrade Trailering System with Hitch Guidance, Hitch View and In-Vehicle Trailering App• Heated and ventilated perforated front leather seating surfaces• 13.4-inch GMC Premium Infotainment System with Google built-in• 15-inch multicolor Head-Up Display and Rear Camera Mirror• GMC MultiPro six-function tailgate and factory spray-on bedlinerThe Sierra 2500 HD AT4 is designed for drivers who need a truck capable of handling demanding work during the week and outdoor travel on the weekend. Its Duramax diesel power, integrated trailer brake controller and advanced trailering technology support confident towing, while the Autotrac two-speed transfer case, automatic locking rear differential, skid plates and off-road suspension add capability on loose, uneven or changing terrain.Inside, the Crew Cab provides generous passenger space and a practical 60/40-split rear bench with seatback and full-width underseat storage. Heated and ventilated front seats, heated rear outboard seats, dual-zone automatic climate control and a heated steering wheel help keep the cabin comfortable throughout the year. The 13.4-inch touchscreen, 12.3-inch Driver Information Center, wireless Apple CarPlay, wireless Android Auto and wireless phone charging keep essential information and compatible devices within easy reach.The AT4 Preferred Package adds useful convenience features, while the 15-inch Head-Up Display projects key driving information within the drivers line of sight. The Rear Camera Mirror provides a wider, less obstructed view behind the truck, and Adaptive Cruise Control is engineered to assist with maintaining a selected following gap, including compatible trailering situations.Bed utility is equally well considered. The MultiPro tailgate offers six configurations to help with loading, unloading and cargo access, while the spray-on bedliner, LED cargo lighting, integrated side steps, CornerStep rear bumper and 120-volt bed outlet support projects, equipment and recreational gear. Power-retractable assist steps with LED perimeter lighting provide convenient cab access while preserving the trucks rugged profile when retracted.This Summit White Sierra 2500 HD is identified by VIN 1GT4UPEY0TF291260 and model code TK20743. Its verified configuration includes the Duramax diesel powertrain, Crew Cab body, four-wheel drive, 11,750-pound GVWR, 20-inch Gloss Black aluminum wheels, Gooseneck/5th-Wheel Prep Package, ProGrade Trailering System, MultiPro tailgate, power sunroof and Jet Black perforated leather interior with Kalahari accents.For shoppers comparing a new heavy-duty diesel pickup, Crew Cab 4WD truck or off-road towing vehicle in the San Francisco Bay Area, this 2026 GMC Sierra 2500 HD AT4 offers proven Duramax power, advanced trailering technology and premium everyday comfort.Contact Lehmers Concord GMC to confirm availability or schedule a test drive.Looking for a new 2026 GMC Sierra 2500 HD near Richmond, Dublin or Vacaville? Visit Leh