Used 2020 GMC Sierra 3500HD Denali

2020 GMC Sierra 3500 HD Denali New Crew Cab 4x4 – 6.6L Duramax Diesel | Denali Ultimate | Gooseneck Prep | Lifted Onyx Black

Unrivaled capability meets ultimate luxury in this 2020 GMC Sierra 3500 HD Denali New Crew Cab 4x4. Powered by the legendary 6.6L Duramax® Turbo‑Diesel V8 and paired with a fortified Allison® automatic transmission, this heavy‑duty pickup is built to tackle your toughest hauls—and keep you riding in absolute comfort.

Powertrain & Heavy‑Duty Specs

• Engine: 6.6L Duramax Turbo‑Diesel V8 (L5P) – 445 HP & 910 lb‑ft torque

• Transmission: Allison® 10‑Speed Automatic with Tow/Haul mode

• Axle Ratio: 3.42 rear for balanced towing and fuel efficiency (GU6)

• 4x4 System: Premium Denali‑tuned transfer case with auto‑locking rear diff

• High‑Idle Switch (UF3): Maintain engine warm‑up or PTO operation at job sites

Exterior & Utility Upfits

• Color: Onyx Black Metallic (GBA) – Deep gloss, Denali signature finish

• Standard Box: Ideal for flat‑deck or tool‑body upfits

• CMT – Gooseneck/5th Wheel Prep Package: Factory‑installed hitch and wiring harness for safe, secure fifth‑wheel towing

• CF5 – Power Sunroof: Expansive glass panel for light and ventilation

• ACC Aftermarket Wheels & Tires: Aggressive all‑terrain package for off‑road confidence

• ACC 6" BDS Lift Kit: Elevated stance and enhanced approach angles for true capability

• ACC Emissions Systems Deleted: Customized for specialized applications (confirm local compliance)

Denali Luxury & Technology

• R7M – Denali Ultimate Package: Exclusive upgrades including full‑grain leather trimmed dash, 15‑speaker Bose® Performance Series audio, massaging front seats, and adaptive cruise with stop‑and‑go

• CWM – Technology Package: Head‑Up Display, wireless charging, Rear Camera Mirror, and Advanced Trailering App

• H2X – Forge Performance Leather Seats: Black leather‑appointed with heat, ventilation, and detailed stitching

• Interior Accents: Real metal trim, Denali‑branded aluminum pedals, premium carpeting

Comfort & Convenience

• Heated/ventilated/massaging front seats with driver memory

• Heated rear outboard seats and heated steering wheel

• Multi‑zone climate control and remote start

• 8" touchscreen with navigation, wireless Apple CarPlay® & Android Auto™

• Bed lighting, corner‑step rear bumper, and deployable assist steps

Condition & Readiness This Sierra 3500 Denali has been carefully inspected by GM‑certified technicians and is ready to work—or impress—from the jobsite to the showroom. With its Duramax power, Denali luxury, and purposeful modifications, it’s uniquely equipped to haul heavy loads in comfort and style.

📞 Contact Stetson GM today to schedule your test drive or discuss financing tailored to your business or personal needs. This Denali HD is one of the most capable and premium trucks on the market—don’t miss it!