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 capability with the off-road-focused AT4 configuration. Powered by the 6.6L Duramax Turbo-Diesel V8 and paired with an Allison 10-speed automatic transmission and four-wheel drive, this Sierra HD is built for drivers who need substantial pulling power, confident traction and a spacious Crew Cab for work, recreation and longer trips.FEATURE HIGHLIGHTS• 6.6L Duramax Turbo-Diesel V8• Allison 10-speed automatic transmission• Four-wheel drive• Crew Cab configuration with four full-size doors• AT4 heavy-duty off-road-oriented trim• GMC MultiPro Tailgate• Large center infotainment touchscreen and digital Driver Information Center• Integrated trailering technology designed to assist with hitching and trailer use• Heavy-duty pickup capability for towing, hauling and recreational useThe Sierra 2500 HD AT4 is a strong fit for East Bay drivers who need more capability than a light-duty pickup while still wanting a truck that works comfortably as an everyday vehicle. Its Duramax diesel powertrain and four-wheel-drive configuration are well suited to contractors, equipment hauling, RV and trailer owners, property use and outdoor trips throughout Northern California.The Crew Cab gives passengers generous rear-seat room and provides useful interior space for tools, bags and everyday gear. Up front, GMCs large-screen infotainment layout and digital instrumentation put navigation, media, compatible smartphone functions and vehicle information within easy view. The elevated driving position and available camera-based trailering technology are especially useful when maneuvering a heavy-duty truck around parking areas, job sites or a trailer.For towing-focused shoppers, the Duramax and Allison combination is one of this Sierra HDs defining advantages. Strong low-rpm torque helps when accelerating with a load or climbing grades, while the 10-speed transmission keeps the engine operating within an effective power range. Integrated Tow/Haul functionality and GMC trailering technology help make hitching, monitoring and highway travel with a trailer more manageable.The AT4 configuration also adds an off-road emphasis that suits trips beyond maintained pavement. Four-wheel drive provides additional traction for loose surfaces, wet conditions and mountain travel, making this truck a practical choice for drivers who split their time between commuting, towing, job-site use and outdoor recreation.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 Duramax diesel power, an Allison 10-speed automatic and a versatile four-wheel-drive 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 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 fees and optional equipment. Dealer sets final price. Price includes: $1