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GMC offers the 2023 Sierra 1500 in eight trim levels – Pro, SLE, Elevation, SLT, AT4, Denali, AT4X, and Denali Ultimate – plus the aforementioned AT4X AEV Edition variant. The Pro, SLE, and Elevation base engine is a turbocharged 2.7-liter four-cylinder unit that makes 310 horsepower and 430 lb.-ft. of torque. These trims can be upgraded to a 5.3-liter V8 making 355 horsepower and 383 lb.-ft of torque; this powerplant comes standard on the SLT and Denali. A larger V8, the 6.2-liter powerplant that produces 420 horsepower and 460 lb.-ft. of torque, comes on the AT4X AEV Edition and Denali Ultimate and is optional in the SLT, AT4, and Denali. A revamped turbocharged Duramax 3.0-liter six-cylinder diesel (305 horsepower and 495 lb.-ft. of torque) is standard in the AT4 and optional for most other Sierra trims (except the Pro and AT4X).
The four-cylinder engine is managed by an eight-speed automatic transmission, while the other powerplants rely on a ten-speed automatic. Rear-wheel drive is the base drivetrain for most Sierra trims, with 4WD optional for all but the AT4, AT4X, and Denali Ultimate, which all have standard 4WD.
There are three cab styles: regular (two doors), double (two standard front doors and two smaller rear doors), and crew (four standard doors). GMC also offers three cargo bed lengths: short (69.92 inches), standard (79.44 inches), and long (98.20 inches). The regular cab is exclusive to the Pro trim (with a standard or long bed). A double cab (standard bed only) can be ordered with the Pro, SLE, and Elevation trims. All Sierra trims are available in a crew cab configuration with the short or standard bed (the AT4X and Denali Ultimate are crew cab/short bed-only).
Depending on trim and equipment, the 2023 Sierra can handle a payload maximum from 1,880 to 2,240 pounds. Otherwise, they can tow (with the proper equipment) a trailer ranging from 9,200 to 13,200 pounds, depending on the trim and configuration. The official EPA fuel economy estimates also vary based on the trim, engine, drivetrain, and other features. For example, the turbo four-cylinder is rated for 17 to 19 mpg around town and 18 to 22 mpg on the open road. As far as the V8s, the 5.3-liter is estimated to achieve 15 to 16 mpg in the city and 17 to 21 mpg on the highway, while the 6.2-liter is rated to return 14 to 15 city and 17 to 19 highway. The 3.0-liter Duramax diesel is rated for 21 to 24 mpg around town and 23 to 29 mpg on the highway.
The job-focused Pro has the most straightforward equipment: single-zone manual air conditioning, LED exterior lighting, a 40/20/40-split folding front bench, heated power side mirrors, rubberized vinyl flooring, four-way manually adjustable front outboard seats, black-finished bumpers, and 17-inch steel wheels. For the SLE, the MultiPro tailgate and a trailering package are some of the standard features. It’s also upgraded with remote start, dual-zone automatic climate control, a ten-way power driver’s seat with lumbar control, heated front outboard seats, a heated and wrapped steering wheel, keyless entry and ignition, a 12.3-inch digital instrument cluster, and 17-inch aluminum wheels. The Elevation adds body-color bumpers, LED fog lights, black exterior accents, a rear window defroster, and 20-inch gloss-black aluminum wheels.
The SLT moves things into the middle tier with premium cabin touches like leather upholstery, a ten-way power front passenger seat, an auto-dimming rearview mirror, and a driver’s position memory system. This trim also has a power lock and release tailgate, chrome exterior accents, heated power-adjustable/power-folding side mirrors, upgraded trailering equipment, rain-sensing windshield wipers, and 18-inch aluminum wheels. The AT4 combines upscale features (such as perforated heated and ventilated front seats) and rugged off-pavement capabilities with the likes of an off-road-tuned suspension with a 2-inch lift, mud-terrain tires, an enhanced traction control system, skid plates, recovery hooks, and a spray-on bedliner. The Denali trim literally shines with chrome side steps and other chrome accents (including a unique grille), and 20-inch polished-aluminum wheels. It also has an adaptive suspension, a power-sliding rear window, and heated second-row seats.
GMC expands on the AT4 with the AT4X by adding a beefier suspension, a two-speed transfer case, front and rear electronic locking differentials, premium leather upholstery, wood interior accents, a head-up display, and 16-way power front seats with massage feature. The freshly introduced AT4X AEV ramps things up with unique front and rear fascias, 18-inch AEV Salta wheels with 33-inch mud-terrain tires, exclusive bumpers with reinforced recovery points and front winch capability, and boron steel skid plates. This version also has improved ground clearance and approach/departure angles that help it cement its crown of the most capable GMC Sierra ever.
Building off the Denali and incorporating many of the luxury features of the AT4X is the Denali Ultimate. This top-of-the-line trim gets full-grain leather covering the seats, door panels, instrument panel, and center console lid. Its additional cabin upgrades include a power sunroof, 16-way power front seats with massage, a head-up display, open-pore wood accents, and a digital rearview mirror.
Every 2023 Sierra is equipped with GMC Pro Safety for forward collision alert, automatic emergency braking, front pedestrian braking, lane departure warning, lane keep assist, a following distance indicator, and automatic high beams. GMC adds the vibrating safety alert seat to the AT4, AT4X, Denali, and Denali Ultimate (it’s optional on the SLT). GM’s Super Cruise semi-autonomous driving technology is optional on the Denali and Denali Ultimate.
A 7-inch touchscreen infotainment system with a multi-speaker sound system keeps Pro trim occupants connected and entertained, while the higher trims get a 13.4-inch touchscreen. Apple CarPlay and Android Auto (wireless on the SLE and above), Bluetooth, and an array of USB ports are also standard equipment. SiriusXM satellite radio and access to OnStar/GMC Connected Services and a Wi-Fi hotspot are available on the Pro and standard on the SLE and above. A seven-speaker Bose audio system is optional for the Elevation and SLT and standard on the AT4 and Denali. A 12-speaker Bose setup comes standard on the AT4X and Denali Ultimate.
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Based on model year EPA mileage ratings. Use for comparison purposes only. Your actual mileage will vary depending on how you drive and maintain your vehicle.