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 Onyx Black is available at Lehmers Concord GMC. Powered by a Duramax 6.6L Turbo-Diesel V8 paired with an Allison 10-speed automatic transmission, this heavy-duty pickup combines diesel capability, an upgraded trailering configuration and a well-equipped Jet Black interior with Kalahari accents.FEATURE HIGHLIGHTS• Duramax 6.6L Turbo-Diesel V8 and Allison 10-speed automatic• AT4 Premium Plus Preferred Package and Technology Package• Max Trailering Package with upgraded frame, rear axle and suspension equipment• Two-speed Autotrac transfer case, skid plates and all-terrain tires• HD Surround Vision, Bed View Camera and Rear Camera Mirror• 13.4-inch GMC infotainment touchscreen with Google built-in compatibility• Heated and ventilated front seats with heated rear outboard seats• GMC MultiPro Tailgate, spray-on bedliner and AT4 high-clearance steps• Power sunroof, head-up display and Bose premium sound systemThis Sierra 2500 HD AT4 is built for drivers who need serious work capability without giving up comfort during everyday travel. Its Duramax diesel powertrain, four-wheel drive, automatic locking rear differential and Tow/Haul mode support demanding job-site, recreational and trailering needs. The Crew Cab provides useful passenger room for family or coworkers, while the AT4 suspension, skid plates and all-terrain tires add confidence when pavement gives way to dirt, gravel or changing terrain.The Max Trailering Package gives this VIN a 3500 HD frame, upgraded leaf springs, a 12-inch rear axle, a dedicated shock package and gooseneck/fifth-wheel provisions. A factory trailer brake controller, vehicle trailering app, Trailer Side Blind Zone Alert and StabiliTrak with trailer-sway control help simplify trailer setup and provide added support on the road. Exact towing and payload limits depend on the final load, hitch and trailer configuration and should be confirmed before use.Inside, 10-way power front bucket seats, driver-seat and mirror memory, dual-zone climate control and a heated steering wheel create a comfortable environment for long workdays and road trips. Heated and ventilated front seats are joined by heated rear outboard seats, while the folding rear bench and under-seat storage package provide flexible space for passengers, tools and personal gear.The 13.4-inch Premium GMC Infotainment System includes Google built-in compatibility, wireless Apple CarPlay, wireless Android Auto and Bluetooth® for compatible phones. A 12.3-inch Driver Information Center, Bose premium audio and multicolor head-up display keep information and entertainment easy to access. The Technology Package also adds a Rear Camera Mirror, while HD Surround Vision, front and rear parking assistance and the Bed View Camera improve visibility around this heavy-duty truck.The GMC MultiPro Tailgate provides multiple positions for loading, bed access and work tasks. A factory spray-on bedliner, LED cargo-bed lighting, CornerStep rear bumper and 120-volt bed outlet further improve everyday utility. Power-folding and extending heated trailering mirrors provide additional visibility when towing or navigating tight spaces.This VIN-specific 2026 GMC Sierra 2500 HD AT4 is identified by VIN 1GT4UPEY9TF284159 and model code TK20743. Its verified MSRP is $90,730, including the Duramax diesel engine, AT4 Premium Plus Preferred Package, Max Trailering Package, Onyx Black paint, dual alternators and destination charge. Pricing, incentives and availability are time-sensitive and should be confirmed directly with Lehmers Concord GMC.For shoppers comparing a new heavy-duty pickup, diesel Crew Cab or four-wheel-drive trailering truck in the San Francisco Bay Area, this 2026 GMC Sierra 2500 HD offers Dura