The 2021 GMC Terrain SLE is the compact SUV that delivers bold styling, smart technology, and everyday versatility at an aggressive value. This is not just a practical crossover. It is a confident, professional-looking SUV built to handle your daily commute, weekend plans, and everything in between without compromise. If you want efficiency, comfort, and capability wrapped in unmistakable GMC design, this Terrain SLE is ready to go.
On the outside, the Terrain commands attention with its signature GMC grille, sharp body lines, sculpted hood, and modern LED lighting. The strong stance and clean design give it a refined yet rugged appearance that stands out in a crowded SUV market. It has the look of a vehicle that means business while still maintaining a polished, upscale presence.
Under the hood, the efficient turbocharged engine delivers smooth acceleration and impressive fuel economy. Paired with a responsive automatic transmission, this Terrain offers confident power for merging, passing, and highway cruising while remaining economical for everyday driving. The suspension is tuned for comfort and stability, giving you a quiet, composed ride whether you are navigating city streets or open highways.
Step inside and you will appreciate the smart, driver-focused layout. The cabin is designed with quality materials and thoughtful details throughout. The SLE trim offers premium cloth seating, a power-adjustable drivers seat, keyless entry with push-button start, and a spacious interior that comfortably accommodates passengers in both rows. Rear seat passengers enjoy generous legroom, and the flexible seating configuration allows you to quickly fold down the rear seats to expand cargo space.
Technology is a major highlight in the 2021 Terrain SLE. The intuitive touchscreen infotainment system includes Apple CarPlay, Android Auto, Bluetooth connectivity, and multiple USB ports to keep everyone connected. The crisp display is easy to navigate, and steering wheel-mounted controls keep your hands exactly where they belong. Whether you are streaming music, taking calls, or using navigation apps, everything works seamlessly.
Safety is built into the foundation of this SUV. Equipped with advanced driver-assist features including forward collision alert, automatic emergency braking, lane keep assist, lane departure warning, a rearview camera, stability control, traction control, and a full airbag system, this Terrain is engineered to help protect you and your passengers on every drive. Confidence comes standard.
Versatility is another strength. The rear cargo area offers ample space for groceries, luggage, sports gear, or work equipment. The wide opening and low load floor make it easy to pack and go. Whether you are running errands, heading out on a road trip, or loading up for the week ahead, this Terrain adapts to your needs.
The 2021 GMC Terrain SLE delivers aggressive value with modern styling, efficient performance, advanced safety, and everyday practicality. If you are looking for a dependable SUV that looks sharp, drives smooth, and fits your lifestyle without stretching your budget, this Terrain SLE is ready to exceed expectations and priced to move today.
Used 2021 GMCTerrain SLE
- Exterior Color
- Ebony Twilight Metallic
- Interior Color
- Jet Black
- Odometer
- 55,225 miles
- Body/Seating
- AWD SLE/5 seats
- Transmission
- Automatic
- Engine
- 4
- VIN
- 3GKALTEV6ML361537
- Stock Number
- HG2434A
GMC
Terrain
Highlighted Features
- Navigation system
- Lane departure
- Automatic temperature control
- Emergency communication system
- Wireless phone connectivity
- Parking sensors
- Exterior parking camera rear
- Front dual zone A/C
- Auto high-beam headlights
- Auto-dimming rearview mirror
- High intensity discharge headlights
- Split folding rear seat
Included Packages & Accessories
Detailed Specifications
- 1-touch down
- 1-touch up
- Adaptive Cruise Control: Adaptive Cruise Control
- Air conditioning
- Auto-dimming rearview mirror
- Automatic temperature control
- Driver door bin
- Driver vanity mirror
- Emergency communication system: OnStar and GMC connected services capable
- Front beverage holders
- Front dual zone A/C
- Illuminated entry
- Navigation system: GMC Connected Navigation
- Overhead console
- Passenger door bin
- Passenger vanity mirror
- Power windows
- Proximity key: doors and push button start
- Rear beverage holders
- Rear door bins
- Remote engine start: keyfob
- Remote keyless entry
- Speed control
- Telescoping steering wheel
- Tilt steering wheel
- Trunk/hatch auto-latch
- Alloy wheels
- Four wheel independent suspension
- Front anti-roll bar
- Power steering
- Rear anti-roll bar
- Speed-sensing steering
- 1st row LCD monitors: 2
- AM/FM radio: SiriusXM
- Primary LCD size: 8.0"
- Radio data system
- Satellite radio trial duration with new vehicle purchase (months): 3
- Smart device integration: Apple CarPlay/Android Auto
- Speakers: 6
- Steering wheel mounted audio controls
- Turn-by-turn navigation directions
- Wireless phone connectivity: Bluetooth
- Front center armrest
- Front seats: bucket
- Heated front seats
- Max seating capacity: 5
- Power 2-way driver lumbar support
- Power driver seat
- Premium cloth
- Rear seat center armrest
- Rear seats: bench
- Rear seats Folding position: fold forward seatback
- Seat Upholstery: premium cloth
- Split folding rear seat
- Compressor: intercooled turbo
- Cylinder configuration: I-4
- Drive type: all-wheel
- Engine liters: 1.5L
- Engine location: front
- Fuel economy city: 25mpg
- Fuel economy combined: 26mpg
- Fuel economy highway: 28mpg
- Fuel tank capacity: 15.6gal.
- Horsepower: 170hp @ 5,600RPM
- Hybrid traction battery type: none
- Manual-shift auto
- Mode select transmission
- Number of valves: 16
- Recommended fuel: Regular Unleaded
- Standard fuel economy fuel type: gasoline
- Torque: 203 lb.-ft. @ 2,000RPM
- Transmission: 9 speed automatic
- Variable valve control
- Ground clearance (min): 175mm (6.9")
- Bumpers: body-color
- Heated door mirrors
- Power door mirrors
- Power liftgate
- Rear cargo: power liftgate
- Roof rack: rails only
- Spoiler
- Trailer sway control
- Turn signal indicator mirrors
- Compression ratio: 10.00 to 1
- Curb weight: 1,643kg (3,622lbs)
- Engine bore x stroke: 73.9mm x 86.4mm (2.91" x 3.40")
- Engine displacement: 1.5 L
- Engine horsepower: 170hp @ 5,600RPM
- Engine torque: 203 lb.-ft. @ 2,000RPM
- Exterior body width: 1,839mm (72.4")
- Exterior height: 1,661mm (65.4")
- Exterior length: 4,630mm (182.3")
- Front headroom: 1,016mm (40.0")
- Front hiproom: 1,382mm (54.4")
- Front legroom: 1,039mm (40.9")
- Front shoulder room: 1,453mm (57.2")
- GVWR: 2,100kg (4,630lbs)
- Interior maximum rear cargo volume: 1,792 L (63 cu.ft.)
- Interior rear cargo volume: 838 L (30 cu.ft.)
- Rear headroom: 978mm (38.5")
- Rear hiproom: 1,316mm (51.8")
- Rear legroom: 1,008mm (39.7")
- Rear shoulder room: 1,412mm (55.6")
- Towing capacity: 680kg (1,500lbs)
- Turning radius: 5.7m (18.7')
- Wheelbase: 2,725mm (107.3")
- Appearance: analog
- Auto high-beam headlights
- Blind spot: Lane Change Alert with Side Blind Zone Alert warning
- Compass
- Configurable
- Delay-off headlights
- Exterior parking camera rear
- Front reading lights
- Fully automatic headlights
- High intensity discharge headlights
- Lane departure: active
- Low tire pressure warning
- Outside temperature display
- Parking sensors: rear
- Rear window defroster
- Rear window wiper
- Tachometer
- Trip computer
- Variably intermittent wipers
- 4 wheel disc brakes
- ABS brakes
- Brake assist
- Dual front impact airbags
- Dual front side impact airbags
- Electronic stability
- Forward collision: mitigation
- Front pedestrian detection: prevention
- Ignition disable
- Occupant sensing airbag
- Overhead airbag
- Panic alarm
- Perimeter/approach lights
- Rear collision: warning
- Security system
- Tracker system
- Traction control
Dealer Notes
KBB.com Consumer Reviews

Overall3.9Out of 5
- 5.0
Awesome car
By OHGMCDenali | on 2/13/2026 7:18:25 PM
This purchase has turned out to be the best thing I did in car purchasing in a while. I enjoy the ride, the comfort and the equipment. Its not a rocket ship but who needs an SUV to go from 0 - 60 in 2 secs? If you need that stay in a sports car. You'll love this well made SUV… - 4.0
Drives and rides great!
By NanaKaren | on 1/7/2026 4:26:41 AM
It drives and rides great! It has all the bells and whistles you would expect on a denali. The back seats are just as comfortable as the front seats are. The only draw back is the wind and road noise.… - 5.0
2019 GMC Terrain SLT AWD
By Victor | on 7/28/2025 10:09:34 PM
Start to finish the BEST SUV for the $$$. GMC quality and luxury combined at it's best! One happy customer with NO regrets…
All reviews on KBB.com
Based on 53 consumer ratings for 2018–2024 models. | Privacy
Vehicle with advertised incentives and discounts available for purchase at the time of posting, subject to published qualifications for applicable incentives. Pricing is subject to changes as a result of expiration or change to manufacturer incentives and other discounts, manufacturer model/option changes, and market adjustment.
All prices shown exclude taxes, title, license and $251.05 IN doc fee. Dealer will not honor pricing errors displayed here. Vehicle with advertised incentives and discounts available for purchase at the time of posting, subject to published qualifications for applicable incentives. Pricing is subject to changes as a result of expiration or change to manufacturer incentives and other discounts, manufacturer model/option changes, and market adjustment.
All prices shown exclude taxes, title, license and $251.05 IN doc fee. Dealer will not honor pricing errors displayed here. Vehicle with advertised incentives and discounts available for purchase at the time of posting, subject to published qualifications for applicable incentives. Pricing is subject to changes as a result of expiration or change to manufacturer incentives and other discounts, manufacturer model/option changes, and market adjustment.
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