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 at Lehmers Concord GMC combines heavy-duty diesel capability with factory off-road hardware and a premium, driver-focused cabin. 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 and four-wheel drive, providing substantial low-rpm pulling power for trailering, job-site use and long-distance travel.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• AT4 Off-Road Suspension Package with twin-tube Rancho shocks and skid plates• Hill Descent Control for added confidence on steep or loose terrain• 20-inch gloss-black aluminum AT4 wheels• Jet Black interior with Kalahari accents and heated and ventilated perforated leather front seating surfaces• 13.4-inch GMC Premium Infotainment System with Google built-in compatibility• 12.3-inch digital Driver Information Center• HD Surround Vision with multiple available camera views for improved visibility around the truckThe Sierra 2500 HD AT4 is designed for drivers who need genuine heavy-duty capability but also spend time away from pavement. The Duramax diesels 975 lb-ft of torque, four-wheel drive and AT4 off-road suspension make this Crew Cab a strong fit for contractors, recreational towing, ranch or property use, camping trips and weekends in the Sierra. Its heavy-duty platform also provides the stability and durability shoppers expect when moving larger trailers or equipment.Inside, the Crew Cab provides generous passenger space while the AT4-specific Jet Black and Kalahari interior gives the truck a distinctive upscale feel. Heated and ventilated leather front seats and a heated steering wheel add comfort through changing Bay Area and mountain weather. The 13.4-inch touchscreen and 12.3-inch digital Driver Information Center place navigation, vehicle information, entertainment and compatible smartphone functions within easy reach and view.Trailering and maneuvering a heavy-duty pickup are made easier by GMCs camera and driver-assistance technology. HD Surround Vision provides added visibility around the Sierra, while the available camera-view system is designed to help with parking, hitching and monitoring the areas surrounding the truck. Adaptive Cruise Control with trailering can account for the additional drag and braking distances associated with towing, helping make longer highway drives more manageable.The Duramax is paired with a 3.42 rear axle ratio, exhaust brake and Tow/Haul functionality. The Allison transmission can use Auto Grade Braking to assist with downhill speed control while towing or hauling, reducing unnecessary brake use on long grades. GMC rates properly configured 2026 Sierra 2500 HD AT4 models for substantial conventional and gooseneck/fifth-wheel towing; actual capacity for this truck depends on its specific trailering equipment, hitch type, payload and trailer configuration.For shoppers comparing a new heavy-duty diesel pickup, Crew Cab 4x4 or off-road-oriented HD truck in the San Francisco Bay Area, this 2026 GMC Sierra 2500 HD AT4 offers 975 lb-ft of Duramax torque, an Allison 10-speed automatic and factory AT4 off-road equipment in a premium Crew Cab configuration.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 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 de