2021, AT4, Four Wheel Drive, 5.3 Liter, Heated Steering Explore the unbeaten path in our unbeatable 2021 GMC Sierra 1500 AT4 Crew Cab 4X4 that can handle both tough trails and daily traffic in Onyx Black! Featuring a time-tested 5.3 Litre EcoTec3 V8 that supplies 355hp matched to a 10 Speed Automatic transmission for power on demand. This Four Wheel Drive Sierra is ready to conquer all terrains, and it can reach approximately 11.2L/100km on the highway. Engineered for off-road enthusiasts, the Sierra AT4 boasts hardware including a trail-tuned suspension, a two-speed AutoTrac transfer case, GMC's six-way MultiPro tailgate, and a 2-inch factory lift kit for the added ground clearance you need to roll right over the rough stuff. Smart storage solutions and an athletic design highlight the AT4 cabin, which keeps you comfortable in extreme conditions with heated/cooled front seats, a heated leather-wrapped steering wheel, dual-zone automatic climate control, and smart technology. A ProGrade Trailering System with Hitch Guidance and a hitch-mounted camera set the tone, while an 8-inch touchscreen, Android Auto, Apple CarPlay, Bluetooth, available WiFi, and a six-speaker audio system keep you connected in our Sierra AT4. A high-strength steel frame provides peace of mind and is matched by GMC safety features like StabiliTrak, trailer-sway control, hill-start assist, a backup camera, a tire-pressure monitoring system, multiple airbags, and more. Leave the pavement and your worries behind in our Sierra AT4! Why Dean Cooley GM? Dean Cooley GM in Dauphin is very proud to have been serving the parkland area since 1995. Selling brand new Chevrolet, Buick and GMC vehicles as well as certified pre-owned vehicles. Our financial experts are located in-house and can offer you the financing and leasing options that are best for you with fast, easy and approval in minutes. We have a state of the art service department with a collision and glass center with highly trained and experienced technicians to look after all of your repair needs. Our parts department is well stocked with all the parts you may need, as well as accessories and a great selection of tires. We also have a detail center, to look after cleaning your vehicle whenever necessary and make it look brand new again. Dean Cooley GM is proud to be a part of the parkland area and supporting many charities and organizations. So, for all of your automotive needs, stop down Dean Cooley GM, 1600 Main Street S. in Dauphin. Dealer permit #1693