This 2024 GMC Sierra 3500HD Denali Ultimate is finished in White Frost Tricoat over an Alpine Umber leather interior. Power comes from the Duramax 6.6-liter turbodiesel V8 producing 470 horsepower and 975 lb-ft paired with an automatic transmission. The odometer shows 67,613 miles. Denali Ultimate is the top of the Sierra HD range, and the updated Duramax introduced for 2024 is the most powerful diesel GMC has offered in a pickup.

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