Pick the 2026 GMC Sierra 2500HD Denali Diesel if you need the highest horsepower (470 HP) and the greatest towing capacity (22,390 lbs). The RAM 2500 Tradesman 4x4 Crew Cab carries a 4-star NHTSA overall rating; the Sierra 2500HD Denali Diesel is not rated. Neither publishes basic warranty yet.
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