Sierra 3500

Spider

AWD4WD

8-Cylinder Turbo

Diesel

2021 GMC Sierra 3500HD AT4 4WD Duramax 6.6L Turbo-Diesel | Allison 10-Speed Summit White | Jet Black with Kalahari Accents Duramax torque. AT4 stance. Built for real work. If you re shopping heavy-duty diesels, you re focused on drivetrain, maintenance history, and configuration not showroom shine. This Sierra 3500HD AT4 checks those boxes. Ownership &amp; Service History CARFAX reflects: Minor damage reported 24 documented service records 3 previous owners Personal vehicle use The minor CARFAX entry is disclosed and reflected in positioning. Service depth is strong and consistent which matters most in this segment. Clear record. No hidden story. Duramax + Allison The Right Setup 6.6L Duramax Turbo-Diesel V8 Allison 10-speed automatic 4WD capability Built for: Heavy fifth-wheel towing Equipment hauling Long-distance load stability Strong low-end torque delivery At this mileage range, a properly maintained Duramax is well within its working life. AT4 Equipment Functional Capability AT4 off-road suspension Skid protection All-terrain tires Factory lift stance Trailer brake controller HD trailering camera system This is not a base work truck it s a properly optioned AT4. Interior &amp; Technology Heated and ventilated front seats Dual-zone climate control Large infotainment display Wireless Apple CarPlay&reg; &amp; Android Auto Bose&reg; premium audio Head-Up Display Comfortable enough for daily driving, built for heavy-duty use. Why This Sierra Makes Sense Duramax platform AT4 configuration Strong service history Transparent CARFAX Heavy-duty capability For buyers comparing 3500 diesel inventory, cleanly maintained examples with documented service remain the priority and that s where this truck stands. The Platinum Standard No dealer add-ons No hidden fees Clear documentation Straight numbers If you re looking for a properly maintained 3500HD AT4 that s built to work and priced within today s heavy-duty bracket this one deserves a serious look.

Used 2021 GMC Sierra 3500 AT4 w/ AT4 Premium Plus Package

Used 2021 GMC Sierra 3500 AT4 w/ AT4 Premium Plus Package Terrell TX 75160

AT4 Premium Plus Package

Gooseneck/5TH Wheel Package

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Used 2021 GMC Sierra 3500 AT4 w/ AT4 Premium Plus Package for sale in Terrell, TX 75160: Truck Details - 773604329 | Kelley Blue Book