Ferguson Buick GMC

950 South Academy Blvd Colorado Springs, CO 80910

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2026 GMC Sierra HD AT4 OVERVIEW Overview Icon

2026 GMC Sierra HD AT4 in Colorado Springs

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  • Exclusive Jet Black interior with Kalahari accents, and heated and ventilated perforated front leather seating surfaces
  • Off-Road Suspension Package with twin-tube Rancho shocks and skid plates
  • Exclusive 20" gloss-black aluminum wheels with available BFGoodrich® off-road tires
  • Adaptive Cruise Control* with trailering*
2026 GMC Sierra HD AT4 Main Img

At Ferguson Buick GMC our helpful and committed sales staff is here to help you with all your needs while looking at the 2026 GMC Sierra HD AT4 for our Colorado Springs customers. Browse our new, used and certified inventory and allow us to help find the vehicle that is perfect for you!

2026 GMC Sierra HD AT4 MODELS

  • Sierra HD AT4

    Sierra HD AT4

  • Sierra HD AT4X

    Sierra HD AT4X

GMC Sierra HD AT4 Dealer in Colorado Springs

2026 GMC Sierra HD AT4 PERFORMANCE Performance Icon

2026 GMC Sierra HD AT4 performance

DURAMAX 6.6L TURBO-DIESEL V8 ENGINE

The Sierra Heavy Duty off-road truck’s available Duramax 6.6L Turbo-Diesel V8 engine features an efficient turbocharger and 10-speed automatic transmission.

2026 GMC Sierra HD AT4 performance

AT4 OFF-ROAD READINESS

The AT4 off-road work truck features an off-road suspension with twin-tube Rancho shocks, skid plates and Hill Descent Control, which uses antilock braking to help you maintain control.

2026 GMC Sierra HD AT4 performance

AT4X OFF-ROAD PROWESS

The AT4X off-road truck is prepared for the challenges of the trail with ground clearance of 11.6 inches, an approach angle of 31.6 degrees and a 25.7-degree departure angle.

2026 GMC Sierra HD AT4 APPEARANCE Appearance Icon

2026 GMC Sierra HD AT4 Appearance Main Img
2026 GMC Sierra HD AT4 appearance

AT4 GRILLE

Stand out with AT4’s bold front-facing exterior design and LED projector headlamps with animated sequences.

2026 GMC Sierra HD AT4 appearance

AT4X EXTERIOR

35" Goodyear Territory MT tires and a factory-installed 1.5" suspension lift on Sierra HD AT4X and AT4X AEV Edition provide serious traction and clearance.

2026 GMC Sierra HD AT4 appearance

20" AT4 WHEELS

Sierra HD AT4’s 20" gloss-black aluminum wheels with available BFGoodrich off-road tires are made for rough trails.

At Ferguson Buick GMC, we know that our Colorado Springs customers go out of their way to see us, and we will do whatever we possibly can to show how much we appreciate their visit. Upon arrival at our Ferguson Buick GMC dealership, our staff will treat you with respect, handling all of your inquiries, questions or concerns with the greatest attention to detail. We take great pride in making a personal connection between our team and our customers. Superior customer service and superior attention to your needs and expectations are just two of the ways that our Colorado Springs customers will know they made the right choice to drive down to Ferguson Buick GMC. The right vehicle at the right price, with flexible auto financing, is waiting for you at Ferguson Buick GMC. Stop in for a test drive of the 2026 GMC Sierra HD AT4 today!

2026 GMC Sierra HD AT4 COMFORT Comfort Icon

2026 GMC Sierra HD AT4 comfort

AT4 INTERIOR

AT4’s Jet Black interior with Kalahari accents features heated and ventilated front seats with leather seating surfaces, and a wrapped heated steering wheel.

2026 GMC Sierra HD AT4 comfort

POWER FRONT SEATS WITH MASSAGING FEATURE

Experience serious comfort in Sierra HD AT4X’s best-in-class* 16-way power front seats with massaging feature.

2026 GMC Sierra HD AT4 comfort

PREMIUM ALL-WEATHER FLOOR LINERS

Help protect your interior with available floor liners with removable carpet inserts.

2026 GMC Sierra HD AT4 comfort

WIRELESS COMPATIBILITY

Connect your compatible smartphone to access a more integrated in-vehicle experience with Apple CarPlay®* or Android Auto™*compatibility.

2026 GMC Sierra HD AT4 SAFETY & WARRANTY Safety Icon

PRO GRADE PROTECTION

Standard on every new GMC - GMC Pro Grade Protection has you truly protected with features and services including:

  • 3-year / 36,000-mile Bumper-to-Bumper Limited Warranty
  • 5-year / 60,000-mile Powertrain Limited Warranty
  • 5-year / 60,000-mile Roadside Assistance & Courtesy Transportation
  • 3-year / 36,000-mile Corrosion Protection
  • 6-year / 100,000-mile Rust-Through Protection
  • First maintenance visit
2026 GMC Sierra HD AT4 Safety Main Img
2026 GMC Sierra HD AT4 safety

FORWARD COLLISION ALERT

Forward Collision Alert can warn you if it detects a potential front-end collision with a vehicle you’re following so you can quickly take action. It can also provide a tailgating alert if you’re following a vehicle much too closely.

2026 GMC Sierra HD AT4 safety

FRONT AND REAR PARK ASSIST

Front and Rear Park Assist* can provide distance alerts to nearby detected objects in front of or behind your vehicle to help you park and avoid collisions at low speeds.

2026 GMC Sierra HD AT4 safety

LANE CHANGE ALERT WITH SIDE BLIND ZONE ALERT*

Lane Change Alert with Side Blind Zone Alert can provide side-mirror visual alerts when a detected moving vehicle is quickly approaching or is in your side blind zone. It can help you avoid lane change collisions.

Our Ferguson Buick GMC dealership offers an outstanding inventory line-up composed of new, used and certified pre-owned vehicles. Our courteous and professional sales staff will assist you in finding the right 2026 GMC Sierra HD AT4 that will improve your daily driving experience while enhancing your way of life. We invite you to search our entire inventory on our website; compare models, search specials, and visit our dealership near Colorado Springs and enjoy a test drive of the 2026 GMC Sierra HD AT4 or other top models. If you do not see what it is you are looking for, just let our Ferguson Buick GMC sales staff know, and they will do whatever it takes to locate it for you.

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