2021 GMC Terrain in Alliston, ON

Few can mix elegant sophistication and off-road utility quite like the 2021 GMC Terrain. This compact SUV easily transitions from your professional city needs to an adventurer fit with the best in capable features. From gorgeous accents to versatile interior space to all-wheel drive functionality, this is a GM vehicle that complements every whim of the modern driver. Our Ernie Dean dealership here in Alliston is your top source for the latest and greatest that the 2021 GMC Terrain offers, for sale starting at a terrific value price!

Explore available packages to be added to the Terrain, as well as vs. the Acadia!

Interested in other GMC models? Explore the GMC Sierra 1500, GMC Canyon and GMC Yukon here!

Exterior Design & Features

Terrain Elevated Edition

The Elevated Edition for your Terrain takes your GMC SUV experience to an entirely new level. The highlighted features on this special edition include:

  • 19-inch Gloss Black-painted Aluminum wheels
  • Darkened grille
  • Black exterior accents, trim badging
  • Black mirror caps, roof rails
  • Colour options: Ebony Twilight Metallic, Summit White, Graphite Grey Metallic, Satin Steel Metallic, Quicksilver Metallic

Luxurious Elements

Crafted to the finest quality, you’ll enjoy fine luxurious elements, from the grille to the unique Denali features that will set apart the GMC Terrain from every other crossover SUV on the road.

  • Multidimensional Denali Grille: A satin chrome finish covers this Denali grille with its block-style features, capturing the light ahead of you perfectly.
  • SLE & SLT Refined Grille: This bold grille sets the standard for what to expect with the rest of the SUV, delivering an elegant style that leads it all ahead.
  • Denali Chrome Accents: Accented in chrome across its exterior, including the roof rails, lower door body side moldings, side mirror caps and door handles.

Lighting Features

Don’t ever take the lights on your vehicle for granted, and across the head, tail and fog lights on the GMC Terrain you’ll be fit with the tops in illuminated quality.

  • Headlights: High-Intensity headlamps cut a unique profile on the front of your SLE and SLT. LED headlights on the Denali form a signature C shape.
  • Taillights: That same C style from the front mirrors with the back for a seamless lighting look on each side.
  • Fog lights: Both the SLT and Denali have halogen fog lights to help cut through even the worst of visibility.

Bold Wheels

No matter what trim and wheels you have on your Terrain, you’ll be rolling with a set that exudes bold and aggressive style, ready for any city or country drive.

  • 19-inch Aluminum Wheels: These SLT wheels are complete with grey-painted accents and always demand attention.
  • Denali 19-inch Bright Machined Aluminum Wheels: These standard wheels come with premium grey-painted accents, a stylish look on every turn.
  • 19-inch Gloss Black-painted Aluminum Wheels: The Terrain Elevation Edition exclusives perfectly round out this signature model.
Dimensions:2021 GMC Terrain SLE
Length (mm/in)4,630 / 182.3
Width (without mirrors) (mm/in)1,839 / 72.4
Height (mm/in)1,661 / 65.4
Wheelbase (mm/in)2,725 / 107.3
Ground Clearance (min.) (mm/in)175 / 6.9
Base Curb Weight (kg/lbs)1,643 / 3,622

Interior Design & Features

Cargo Space & Versatility

Your Terrain comes equipped with versatile seating options that let you customize the layout for your passengers and cargo alike. You can store items inside as long as 8 feet long. Stylish, luxurious and versatile is the 2021 Terrain. Enjoy these different configurations:

  • All Up: Front and rear are up.
  • Back Left Down: The rear left seat (behind the driver) is folded down.
  • Second Row Down: Both rear seats are folded down.
  • All Down: The rear seats along with the front passenger seat are folded down.

Interior Luxury Touches

Just as the exterior presents gorgeous luxurious touches to go along with its sporty look, so does the interior, allowing you to relax in refined comfort and style wherever you look. These features are highlighted by the following:

  • SLT real aluminum trim
  • Real-burnished aluminum accents
  • SLT soft-touch materials
  • Leather-wrapped, 4 spoke steering wheel
  • Denali French-stitched leather-appointed front seats

SkyScape Sunroof

Both you, the driver, as well as your front and rear passengers can all share in the same gorgeous view thanks to the available SkyScape sunroof that extends from the front to over the second row, inviting a unique view of the world above.

Dimensions:2021 GMC Terrain SLE
Front Headroom (mm/in)1,016 / 40.0
Rear Headroom (mm/in)978 / 38.5
Front Legroom (mm/in)1,039 / 40.9
Rear Legroom (mm/in)1,008 / 39.7
Front Shoulder Room (mm/in)1,453 / 57.2
Rear Shoulder Room (mm/in)1,412 / 55.6
Front Hip Room (mm/in)1,382 / 54.4
Rear Hip Room (mm/in)1,316 / 51.8
Passenger Volume (L)2,922
Passenger Capacity5

Performance & Capability

Traction Select System

As the driving conditions change around Alliston and anywhere you end up here in Ontario, so does your Terrain adapt to those conditions, too. This standard Traction Select System works in real time to adjust for your needed capability.

  • FWD Mode: Provides terrific fuel efficiency for regular driving, disconnecting the rear axle and cutting out any drag it causes.
  • AWD Mode: Sends power to any wheel that needs it, especially in rough conditions like snow, ice or wet roads.
  • Off-Road Mode: Improves on the AWD mode for driving on environments with dirt, gravel or sand.
  • Tow/Haul Mode (available): Primed to improve for all of your towing needs.

Denali Premium Suspension

Coming fit on the Denali is its premium suspensions with enhanced shock control. The system features a valve internal to the struts along with shocks that help to provide a more seamless and stable ride. It also works to reduce unwanted noise outside when you’re driving through conditions, thanks to the urethane spring isolators.

Hill Descent Control

All it takes is the push of one button for better control on hills in your Terrain. The Hill Descent Control utilizes antilock braking, allowing for a smooth descent when traversing down a steep incline, one that will instill confidence and keep you in control at all times.

Specifications:2021 GMC Terrain
Engine1.5L Gas Turbo-Charged
Torque (lb-ft)203
Fuel Consumption (AWD) (city/highway) (L/100 km)9.6 / 8.3
Fuel Consumption (FWD) (city/highway) (L/100 km)9.2 / 7.9


HD Surround Vision

Cameras all around your 2021 Terrain combine in this High Definition Surround Vision system to create a digital overhead view of your SUV. It combined with the front cameras and Rear Vision Camera give you an unprecedented look all around your vehicle. Conveniently use it to help yourself park.

Built-in Navigation

Just as your smartphone provides you maps and navigation, so does your Terrain, with built-in navigation directly into your vehicle. That means navigating to your next destination will be a breeze, your Terrain guiding in the most efficient manner available

Apple CarPlay, Android Auto, Amazon Alexa

It’s the 2021 Terrain, which means it’s a must that it includes connections to the top technology available outside of your vehicle. Apple CarPlay and Android Auto provide a simple link to your smartphone for hands-free interaction, while Amazon Alexa does the same, linking you to your Amazon account and all its functionality, from shopping to music streaming.


GMC Pro Safety

GMC Pro Safety comes standard on your 2021 Terrain, a set of safety and drive assistance systems that warn you of potential hazards out on the road, and help you tackle them in the safest manner possible. Available is GMC Pro Safety Plus, with an extra set of tech, including the features in the following sections.

Lane Change Alert

Avoid any possible lane change collisions with this Lane Change Alert. You’ll receive visual alerts in your side mirror if a vehicle slips into your blind spot or is moving too quickly beside you.

Rear Park Assist

Fit your Terrain perfectly in any spot thanks to the Rear Park Assist, providing alerts to let you know how close you are to nearby obstacles. It activates at low speeds in reverse, another set of help in a crowded parking lot.

Rear Cross Traffic Alert

If you’re backing out of a parking spot and can’t see either side if you’re clear to proceed, the Rear Cross Traffic Alert will act as your eyes and alert you if any vehicles may be approaching.

What’s New From the 2020 GMC Terrain?

The GMC Terrain for 2021 exists much the same as it did for 2020, without any major changes. Even still, the 2021 Terrain finds itself at the top of its class against an ever-crowded market of SUVs, especially combining elegant luxury elements and capable features for a seamless experience.

2021 GMC Terrain Model Trims

Front side view of the GMC Terrain SLE, SLT


Starting at $31,198*

Highlighted features:

  • 5L Gas Turbo-Charged engine
  • GMC Pro Safety
  • HID headlights
  • Traction Select System
View SLE Inventory
Front side view of the GMC Terrain SLE, SLT


Starting at $31,198*

Highlighted features:

  • 5L Gas Turbo-Charged engine
  • GMC Pro Safety
  • HID headlights
  • Traction Select System
View 2021 GMC Terrain Inventory
Front side view of GMC Terrain Denali

Denali (Late Avail.)

Starting at TBD

Highlighted features:

  • Denali Premium Suspension
  • LED headlights
  • GMC Pro Safety Plus
  • Front & Rear Park Assist
View 2021 GMC Terrain Inventory

While we love to refer to ourselves as Truckville at Ernie Dean Chevrolet Buick GMC dealership, we also specialize in SUVs from our valued brands. Ontario is fit for SUVs, just like trucks, and whether you’re looking for a Terrain or other model, we have a deep new and used inventory for you to browse. Research, build & price, test drive and drive home in the model of your dreams!

Want to explore some trucks & SUVs here at Ernie Dean? Check out these highlights:

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