GMC Terrain 2018–2021 car dimensions: 4630 mm long, 1839 mm wide and 1661 mm high. Unladen weight is 1,564 kg. Braked towing is 680 kg.
The SL cabin has a standard 7-inch touchscreen with Apple CarPlay and Android Auto, plus Bluetooth. Single-zone manual climate control and electronic cruise control are standard. A rear vision camera is standard. Blind-spot warning, rear parking sensors, lane keep assist and low-speed automatic emergency braking come only on higher trims via packages.
Cargo space measures 29.6 cubic feet behind the rear seats and expands to 63.3 cubic feet with the 60/40 split-folding rear seats down. The front passenger seat also folds flat for longer items.
The SL with its 1.5L turbo engine tows up to 1,500 lbs braked when fitted with the available trailering equipment package, which adds a Class II hitch. Unbraked limit is 1,000 lbs. Payload is around 1,015 lbs.
Heavy-duty cooling is part of the trailering package on equipped models. The base suspension is standard MacPherson strut front and 4-link rear with no reinforced option noted for the SL.
The cabin uses premium cloth seats with dual-firmness foam for support that holds shape over time. Active noise cancellation and an acoustic laminated windshield keep it quiet on the highway. Front seats are comfortable buckets with good leg and head room for adults. The rear 60/40 split bench reclines and folds flat for long cargo. Electronic precision shift frees up console storage with side-by-side cupholders and underfloor cargo bins.
EPA 26 city/30 hwy mpg with 1.5L turbo FWD
Regular unleaded fuel required
Oil life monitor. change at least once a year
Tire rotation every 7,500 miles
NHTSA overall 5-star rating on later production models
IIHS Good ratings in major crashworthiness tests
The base 1.5L turbo four-cylinder with nine-speed automatic delivers 26 city and 30 highway mpg on FWD models. It runs on regular unleaded gasoline. Fuel tank holds about 14.9 gallons.
Service follows the oil life monitoring system. Change oil and filter when the message appears or at least yearly. Rotate tires and perform inspections every 7,500 miles under normal conditions.
Crash tests earn strong marks. Later 2018 models get five stars overall from NHTSA with five in frontal and four in rollover. IIHS rates Good in moderate overlap, small overlap driver-side, side, roof strength, and head restraints. Optional packages add superior front crash prevention.
Standard safety includes rearview camera, StabiliTrak stability control, four-wheel ABS disc brakes, front side and curtain airbags, Teen Driver technology, and Rear Seat Reminder. Higher trims offer packages with blind-spot monitoring, lane keep assist, and automatic braking. Keep up with fluid checks and tire pressure for reliable daily use.
Length 4630 mm, Width 1839 mm, Height 1661 mm, Wheelbase 2725 mm (Terrain 2018–2021)
Sources: manufacturer data, 2019 GMC Terrain Order Guide, published 27 April 2018, 2018 GMC Terrain brochure 18GMCTERRC-25, 2018 GMC Terrain Owner's Manual.