The 2026 GMC Sierra 2500 HD AT4X Crew Cab 4WD pairs the Duramax 6.6L turbo-diesel with exhaust brake, 3.42 axle ratio and an 11,350-lb GVWR. Off-Road …
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The 2026 GMC Sierra 2500 HD AT4X Crew Cab 4WD pairs the Duramax 6.6L turbo-diesel with exhaust brake, 3.42 axle ratio and an 11,350-lb GVWR. Off-Road Suspension rides on LT305/70R18 35-inch mud terrain tires and gloss black wheels. The Gooseneck/5th Wheel Package adds stamped bed holes and a 7-pin trailer harness, while Preferred Equipment Group 4SG brings Trailer Side Blind Zone Alert, front and rear park assist and a power sliding rear window. Sterling Metallic over Obsidian Rush, with 16-way power massaging driver and 10-way passenger bucket seats, driver memory and Premium GMC Infotainment with wireless streaming. In stock at Temecula Valley Buick GMC in Temecula, CA. Stock #G261452.
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