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THESE VEHICLES ARE GENERALLY HIGH MILEAGE OLDER LOWER-PRICED VEHICLES. THESE VEHICLES MAY NEED ADDITIONAL MAINTENANCE REPAIRS SERVICE AND PARTS AFTER PURCHASE. THEY ARE SOLD 100% AS-IS WITHOUT ANY WARRANTY COVERAGE. NO WARRANTY IS EXPRESSED OR IMPLIED AND THAT IS WHY THEY ARE OFFERED AT AUCTION PRICING!<br><br>- 4WD with 2-Speed Active Transfer Case<br>- Duramax 6.6L V8 Turbodiesel with 445 hp and 910 lb-ft of torque<br>- Gooseneck5th Wheel Prep Package with Bed View Camera<br>- Denali Ultimate Package with Power Sunroof and Technology Package<br>- Navigation System with Premium GMC Infotainment<br>- Heated and Ventilated Seats with Leather Trim<br>- Apple CarPlay and Android Auto Integration<br>- HD Surround Vision with Trailer View Camera Provisions<br>- Bose Premium Sound System with SiriusXM<br>- Backup Camera with Ultrasonic Park Assist<br>- ProGrade Trailering System with Integrated Trailer Brake Controller<br>- Wireless Charging and 4G LTE Wi-Fi Hotspot<br>- Engine Block Heater and 220 Amp Alternator<br>- All-Weather Floor Liners<br><br>This 2020 GMC Sierra 3500HD Denali represents capable work-ready performance paired with premium comfort features. The Duramax turbodiesel engine delivers substantial power and torque designed for demanding tasks while the gooseneck and fifth-wheel prep package positions this truck for serious hauling applications. You'll find the truck well-equipped with modern technology including navigation Apple CarPlay Android Auto and a premium infotainment system that keeps you connected on the road.<br><br>The Denali trim brings genuine leather-appointed seating heated and ventilated front seats and a power sunroof that distinguish this truck from standard models. The cabin benefits from dual-zone automatic climate control remote keyless entry with push-button start and a heated steering wheel for added convenience. The white exterior combines practical aesthetics with the truck's p","additionalProperty":[{"@type":"PropertyValue","name":"feature","value":"Navigation System"},{"@type":"PropertyValue","name":"feature","value":"Denali Ultimate Package"},{"@type":"PropertyValue","name":"feature","value":"Driver Alert Package I"},{"@type":"PropertyValue","name":"feature","value":"Driver Alert Package II"},{"@type":"PropertyValue","name":"feature","value":"Gooseneck/5th Wheel Package"},{"@type":"PropertyValue","name":"feature","value":"Gooseneck/5th Wheel Prep Package"},{"@type":"PropertyValue","name":"feature","value":"Heavy Duty Front Spring/Camper Package"},{"@type":"PropertyValue","name":"feature","value":"Preferred Equipment Group 5SA"},{"@type":"PropertyValue","name":"feature","value":"Technology Package"},{"@type":"PropertyValue","name":"feature","value":"7 Speakers"},{"@type":"PropertyValue","name":"feature","value":"AM/FM r"}],"image":[{"@type":"ImageObject","url":"https://imgcdn.lotlinx.com/vdn/42363/gmc_sierra%203500hd_2020_1GT49WEY1LF234318_42363_2741644791.jpg?ver=20260723","description":"2020 GMC Sierra 3500HD - Primary exterior view","representativeOfPage":true}],"seller":{"@type":"AutoDealer","name":"Fred Anderson Buick GMC of GREER","slug":"fred-anderson-buick-gmc-of-greer-greer-sc","telephone":null,"url":null,"address":{"@type":"PostalAddress","postalCode":"29651","addressRegion":"SC","streetAddress":"14000 E Wade Hampton Blvd","addressCountry":"US","addressLocality":"Greer"},"latitude":"34.9492000","longitude":"-82.2050000","dealerGroup":null,"aggregateRating":{"@type":"AggregateRating","ratingValue":4.7,"reviewCount":35,"bestRating":5,"worstRating":1}},"stockNumber":null,"slug":"2020-gmc-sierra-3500hd-unknown","dateCreated":"2026-08-01T10:33:24.512Z","dateModified":"2026-08-02T10:31:49.686Z","safetyRating":null,"recallSummary":null,"referenceSpecs":{"source":"manufacturer_reference","trimName":"Denali","description":"Denali 4dr Crew Cab 4WD 5.8 ft. 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