Used 2017 Gmc Sierra 3500 HD Denali

This truck is currently getting brand new tires. Up for your consideration is this one owner 2017 GMC Sierra 3500HD Denali Crew Cab 4x4 powered by the legendary 6.6L Duramax Turbo Diesel V8. This is a Carfax 1-owner, personal-use truck with no accidents or damage reported and an impressive 40 documented service records. That kind of history tells a story — this Denali was maintained consistently and cared for properly. Most recent service includes an oil and filter change in June 2025, and previous records show regular maintenance including fuel filters, brake service, suspension components, transmission service, and even a glow plug controller replacement. This is the top-of-the-line Denali trim, meaning you get premium leather interior, heated and cooled front seats, navigation, Bose premium audio, power running boards, chrome Denali styling, and all the heavy-duty capability you expect from a 3500HD. Whether you're towing, hauling, or just want one of the most capable diesel trucks on the road, this Sierra delivers serious performance with upscale comfort. At Three 21 Auto, we don’t just put trucks on the lot — we prepare them properly. Every vehicle we sell goes through a complete third-party ASE-certified inspection, followed by a fresh oil change, new filters, and a full detail before being offered for sale. We take pride in offering trucks that are ready to work the day you drive them home. We’ll help make your purchase easy & transparent. No matter your credit situation, we work with local credit unions, banks, and lenders to help get you approved — even if your credit isn’t perfect. Every vehicle on our lot goes through a complete ASE-certified inspection by a trusted third-party shop, followed by a fresh oil change, new filters, and a full detail before it’s offered for sale. We post 30+ high-quality photos on every vehicle so you can review the details and feel confident before visiting. We’re family owned and operated with over 25 years of automotive experience, committed to honest, no-pressure service that truly puts people over profits. Our customers consistently recognize us for transparency, respect, and going the extra mile.