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You can select your 2023 Terrain from four trims: SLE, SLT, AT4, and Denali. The sole powerplant is a turbocharged 1.5-liter four-cylinder engine making 175 horsepower – a 5 hp increase from the 2022 model). Front-wheel drive is standard on the SLE and SLT, with all-wheel drive an option. The AT4 and Denali are only offered with AWD. A nine-speed automatic transmission manages either drivetrain.
The 2023 Terrain has a 1,500-pound maximum towing capacity when it is properly equipped. In FWD form, the Terrain is EPA-rated to return 24 mpg around town and 29 mpg on the open road. The highway fuel efficiency changes to 28 mpg with AWD.
The equipment roster for the starter SLE includes LED exterior lighting with automatic headlights, heated power side mirrors, proximity keyless entry, push-button start, single-zone automatic climate control, rear privacy glass, a 4.2-inch driver information display, four-way manually adjustable front seats, fabric upholstery, and 17-inch aluminum wheels. The available SLE Convenience Package is offered to add dual-zone automatic climate control, heated front seats, an eight-way power driver’s seat with lumbar controls, remote start, and rooftop side rails.
The SLT has everything from the SLE with the Convenience Package, plus a heated and leather-wrapped steering wheel, perforated leather-trimmed seating, fog lights, a hands-free power liftgate, a six-way power front passenger seat with lumbar controls, a driver’s memory system, heated power side mirrors with integrated turn signals, ambient cabin lighting, and 18-inch aluminum wheels. The AT4 adds a rugged touch to the SLT with an underbody skid plate, AT4-themed perforated leather upholstery, exterior accents unique to the trim, and 17-inch gloss-black aluminum wheels. At the top of the Terrain lineup is the Denali. It builds from the SLT with an advanced suspension, a head-up display, fog lights, Denali-themed perforated leather-trimmed seating, a 7-inch driver information display, and 19-inch aluminum wheels. The Denali is eligible for a few optional bundles. The Premium Package will add heated and ventilated front seats, heated rear outboard seats, and additional driver aids as detailed below. The Black Diamond Edition upgrade includes everything from the Premium Package plus exclusive Ebony Twilight Metallic paint, a power sunroof, and 19-inch wheels with an After Midnight finish. A power sunroof is available as a standalone option on all trims.
GMC Pro Safety is the brand’s system of advanced driving aids. This technology includes forward collision alert, automatic emergency braking with front pedestrian detection, lane keep assist with lane departure warning, a following distance indicator, and automatic high beams. The Pro Safety Plus (standard on the Denali) adds adaptive cruise control, rear parking sensors, the Safety Alert Seat (the driver’s seat vibrates with notifications of potential obstacles ahead), and heated power side mirrors with turn-signal indicators (for the SLE, which doesn’t get this feature standard). Blind-spot monitoring with rear cross-traffic alert is included with the Denali and optional on the lower trims. The Denali Premium Package adds adaptive cruise control, a surround-view monitor, and semi-automatic parking support. These features (except for the parking system) can be added to the SLT and AT4.
Infotainment for the 2023 Terrain comes through a 7-inch touchscreen for the SLE and an 8-inch touchscreen for the higher trims. The standard elements are wireless Apple CarPlay and Android Auto, a six-speaker audio system, SiriusXM satellite radio, USB ports, 12-volt and 110-volt power outlets, and access to a Wi-Fi hotspot, OnStar, and GMC Connected Services. Navigation comes with the Denali and is available on the other trims. A seven-speaker Bose audio system is standard on the Denali and optional on the SLT and AT4. Wireless device charging is found only on the Denali.