2021 GMC Sierra 1500 AT4 Features and Specs near Fort Walton Beach, Florida

2021 GMC Sierra 1500 AT4 in Fort Walton Beach, FL

Engine: 5.3L 8cyl
Fuel Economy: 16 city / 21 hwy*
Horsepower: 355 HP
Torque: 383 lb-ft

Serving Fort Walton Beach, FL

The 2021 GMC Sierra 1500 AT4 pickup truck boasts solid on-road and off-road capabilities. Buick GMC Fort Walton Beach offers this light-duty model with high-tech features and dynamic hardware. Ask our auto dealership about the all-new AT4 CarbonPro edition.


Whipping out 355 horsepower, a 5.3 L V8 engine propels the 2021 GMC Sierra 1500 AT4. Boasting the EcoTec3 design, the eight-cylinder powerplant cranks out 383 pound-feet of torque. The Dynamic Fuel Management helps this light-duty pickup truck achieve good fuel economy on the highway. You may request the GMC Sierra 1500 online test drive with a 6.2 L V8 powertrain that yields 420 hp and 460 lb-ft. Also boosted by the DFM technology, this high-level propulsion system allows you to tow 9,200 pounds. Ask the Buick GMC Fort Walton Beach dealership about the optional 3.0 L Duramax engine that unleashes 460 lb-ft. Featuring an exhaust brake, this I-6 diesel engine whips out approximately 280 hp.

Interior and Features

You could enjoy the GMC Sierra 1500 online test drive with best-in-class digital technologies, like a color head-up display that has a 15-inch diagonal footprint on the windshield. The GMC Infotainment System comes with an 8-inch touch screen inside this premium pickup truck. Supporting wireless smartphone integration, this multimedia console is part of the optional AT4 Value Package. You will also receive a wireless phone charger and the Bose sound system from this advanced package. This light-duty GMC pickup truck offers upscale amenities in the cabin, like a dual-zone HVAC system and memory system for the driver’s seat. Featuring two tiers for storage, a spacious center console is installed inside the 2021 GMC Sierra 1500 at Buick GMC Fort Walton Beach. Heated rear outboard seats and a heated steering wheel are also optional for this hard-working GMC model.


Engineered to prevent collisions on urban streets, the Automatic Emergency Braking is optional for the 2021 GMC Sierra 1500 at Buick GMC Fort Walton Beach. When you travel slower than 50 MPH, the Forward Collision Alert is on the lookout for any potential hazards on the road ahead. This light-duty truck offers several advanced visual aids for towing and hauling, such as the Auxiliary Trailer Camera and Bed View Camera. Even the HD Surround Vision technology can be synced with external camera provisions. If you need roadside assistance or other help on the road, the OnStar & GMC Connected Services are available in the infotainment system. The Rear Sear Reminder and Safety Alert Seat are some other class-leading safety features inside this reliable pickup truck.

Take an Online Test Drive

You could sign up for the 2021 GMC Sierra 1500 online test drive by clicking the red button on this page. Get in touch with Buick GMC Fort Walton Beach if you’d like to buy or lease the AT4 edition.

The 2021 GMC Sierra 1500 at Buick GMC Fort Walton Beach is available in the AT4 model, which includes a 4×4 drive system and other durable hardware.

*All figures are EPA estimates. Actual mileage may vary.