The 2021 GMC Sierra 2500HD AT4 is a commanding heavy-duty truck built to handle serious work and deliver genuine capability. With its Duramax 6.6L V8 Turbodiesel engine producing 445 horsepower and 910 lb-ft of torque paired with a 10-speed automatic transmission and four-wheel drive, this truck provides the power and control you need for demanding tasks and challenging terrain. - HD Surround Vision - Wireless Apple CarPlay and Android Auto - Power Sunroof - Gooseneck/5th Wheel Package with Bed View Camera - Premium GMC Infotainment System with Navigation - Bose Premium Audio System - Multicolor 15" Diagonal Head-Up Display - Driver Alert Package II with Automatic Emergency Braking and Lane Departure Warning - Front and Rear Park Assist with Lane Change Alert - Heated and Ventilated Front Bucket Seats - 20" Machined Aluminum Wheels - Remote Vehicle Starter System - Integrated Trailer Brake Controller - Keyless Open and Start - IntelliBeam Automatic High Beam This AT4 comes equipped with a comprehensive suite of safety technologies designed to keep you protected on every journey. The Driver Alert Package II includes forward collision alert, automatic emergency braking, lane departure warning, and IntelliBeam automatic high beam control. Additional systems like ultrasonic front and rear park assist, rear cross traffic alert, and lane change alert with side blind zone detection work together to provide confidence in any driving situation. The AT4 Preferred Package elevates your experience with premium comfort and convenience features. Enjoy heated and ventilated front seats, a Bose premium audio system, remote vehicle starter capability, and wireless charging for your devices. The power sunroof and HD surround vision system enhance your connection to the road and surroundings, while the technology package delivers a multicolor 15-inch head-up display and rear camera mirror for enhanced visibility. For those who tow or haul, this Sierra 2500HD is intelligently prepared. The gooseneck/5th wheel package includes a bed view camera with provisions for two additional trailer cameras, along with an integrated trailer brake controller and in-vehicle trailering system app. These features work together to make connecting and managing your trailer safer and more intuitive. The exterior showcases a fresh black paint with distinctive AT4 styling, including red recovery hooks, spray-on bed liner with AT4 logo, and rugged 20-inch machined aluminum wheels with black accents. The AT4 high clearance step provides easier truck entry and exit, while the power sliding rear window and deep-tinted glass add both function and style. From the premium GMC infotainment system with navigation to the 4G LTE Wi-Fi hotspot capability and GMC Connected Services connectivity, this Sierra 2500HD keeps you informed and in control. The advanced driver information center and multiple USB charging ports ensure your devices stay powered throughout your day. Thank you for visiting McKenzie Buick GMC. Proudly serving the Milton community since 1967, we're committed to delivering a straightforward, transparent buying experience every step of the way. Conveniently located near Blackwater Bay at 6500 Caroline Street (Highway 90 at the Highway 89 Bypass), we offer a full selection of competitively priced new and pre-owned cars, trucks, and SUVs. Whether you're shopping, servicing, or ordering parts, our team is here to help with no surprisesjust honest, reliable service. Reach out anytime or come experience the McKenzie Advantage for yourself.

Additional Information

AT4 Preferred Package,Driver Alert Package I,Driver Alert Package II,Gooseneck/5th Wheel Package,Gooseneck/5th Wheel Prep Package,Hitch Package (LPO),Preferred Equipment Group 4SB,Technology Package,X31 Off-Road Package,6 Speakers,6-Speaker Audio System Feature,AM/FM radio: SiriusXM with 360L,Bose Premium 7 Speaker Sound System,HD Radio,Premium audio system: Premium GMC Infotainment System,Radio: AM/FM w/Premium GMC Infotainment System,Radio: Premium GMC Infotainment Sys w/Navigation,SiriusXM w/360L,Steering Wheel Audio Controls,Air Conditioning,Automatic temperature control,Electric Rear-Window Defogger,Front dual zone A/C,Rear window defroster,12-Volt Rear Auxiliary Power Outlet,120-Volt Bed Mounted Power Outlet,120-Volt Instrument Panel Power Outlet,Driver Memory,Memory seat,Power driver seat,Power steering,Power windows,Power Windows w/Driver Express Up/Down,Remote keyless entry,Remote Vehicle Starter System,Steering wheel mounted audio controls,Universal Home Remote,Manual Tilt-Wheel/Telescoping Steering Column,Off-Road Suspension,Speed-sensing steering,Traction control,4-Wheel Disc Brakes,ABS brakes,Dual front impact airbags,Dual front side impact airbags,Electrical Lock Control Steering Column,Front anti-roll bar,Front wheel independent suspension,Keyless Open & Start,Low tire pressure warning,Occupant sensing airbag,Overhead airbag,Power Door Locks,Power Sunroof,Pickup Box,Brake assist,Electronic Stability Control,Lane Departure Warning System,Hill Descent Control,Delay-off headlights,Front fog lights,Fully automatic headlights,Perimeter Lighting,Panic alarm,Security system,Unauthorized Entry Theft-Deterrent System,Speed control,2-Speed Active Transfer Case,220 Amps Alternator,Engine Block Heater,Exhaust Brake,Heavy-Duty 80 Amp Battery,AT4 High Clearance Step (LPO),Auto-dimming door mirrors,Bumpers: body-color,Front License Plate Kit,Heated door mirrors,IntelliBeam Automatic High Beam On/Off,LED Cargo Area Lighting,LED Smoked Amber Roof Marker Lamps,Painted Black Surround Grille,Power door mirrors,Rear step bumper,Rear Wheelhouse Liners,Red Recovery Hooks,Spray-On Pickup Box Bed Liner w/AT4 Logo,Turn signal indicator mirrors,Winter Grille Cover,2 USB Ports,2 USB Ports (1st Row),2nd Row Dual USB Charge-Only Ports,4.2" Diagonal Color Display Driver Info Center,4G LTE Wi-Fi Hotspot Capable,8" Multicolor Driver Information Center,Apple CarPlay/Android Auto,Auto-dimming Rear-View mirror,Automatic Emergency Braking,Bed View Camera w/2 Trailer Camera Provisions,Compass,Compass Located In Instrument Cluster,Driver door bin,Driver vanity mirror,Floor-Mounted Center Console,Following Distance Indicator,Forward Collision Alert,Front Prem Floor Liners w/Removable Carpet Insert,Front reading lights,GMC Connected Access Capable,HD Rear Vision Camera,HD Surround Vision,Heated steering wheel,Illuminated entry,Inside Rearview Auto-Dimming Rear Camera Mirror,Lane Change Alert w/Side Blind Zone Alert,Multicolor 15" Diagonal Head-Up Display,OnStar & GMC Connected Services Capable,Outside temperature display,Overhead console,Passenger vanity mirror,Rear Cross Traffic Alert,Rear Prem Floor Liners w/Removable Carpet Insert,Rear reading lights,Rear seat center armrest,Tachometer,Telescoping steering wheel,Tilt steering wheel,Trip computer,Ultrasonic Front & Rear Park Assist,Voltmeter,Wireless Charging,Wireless Phone Projection,10-Way Power Driver Seat Adjuster w/Lumbar,10-Way Power Passenger Seat Adjuster w/Lumbar,Front Bucket Seats,Front Center Armrest,Heated & Ventilated Front Bucket Seats,Heated 2nd Row Outboard Seats,Heated Driver & Front Outboard Passenger Seats,Heated front seats,Heated rear seats,Perforated Leather-Appointed Front Seat Trim,Power passenger seat,Safety Alert Seat,Split folding rear seat,Ventilated front seats,Passenger door bin,Hitch Guidance w/Hitch View,In-Vehicle Trailering System App,Integrated Trailer Brake Controller,18" Machined Aluminum Wheels,20" Machined Aluminum Wheels,Alloy wheels,Deep-Tinted Glass,Power Front Passenger Windows w/Express Up/Down,Power Rear Windows w/Express Down,Power Sliding Rear Window w/Defogger,Variably intermittent wipers,HD SURROUND VISION,WIRELESS APPLE CARPLAY AND ANDROID AUTO