Used 2021 GMC Terrain
2021 GMC Terrain Review
By Colin Ryan
Updated January 30, 2025
Pros
- Feels classier than its Chevy Equinox counterpart
- Efficient and user-friendly infotainment system
- Arguably good-looking
- Pleasant ride quality
Cons
- Push-button gear selection instead of traditional lever
- Higher trims are expensive for the class
What's New?
- Optional GMC Pro Safety Plus replaces Driver Alert I package
- Turbo 1.5-liter is the only engine available
- Terrain Denali is a late-arrival model
The 2021 GMC Terrain has a challenge. Although it’s an arguably handsome compact-crossover SUV offering strong turbocharged engines, a chassis that favors ride comfort over cornering precision (perfectly reasonable in this kind of vehicle) and comes with a decent level of standard equipment, it’s in direct competition with such giants of the class as the Honda CR-V and Toyota RAV4. Both Japanese rivals have more interior space for passengers and cargo alike.
So GMC pitches its Terrain at the more upscale end of the market, as illustrated by the elegant (for a crossover SUV) styling. And just to top it off, the late-arriving Denali version is the plushest of all the new Terrain models.
2021 GMC Terrain Pricing
2021 GMC Terrain pricing starts at $14,750 for the Terrain SL Sport Utility 4D, which had a starting MSRP of $26,195 when new. The range-topping 2021 Terrain Denali Sport Utility 4D starts at $20,300 today, originally priced from $38,695.
Original MSRP | KBB Fair Purchase Price (national avg.) | |||
|---|---|---|---|---|
$26,195 | $14,750 | |||
$29,695 | $16,850 | |||
$33,795 | $17,250 | |||
$38,695 | $20,300 |
The Kelley Blue Book Fair Purchase Price for any individual used vehicle can vary greatly according to mileage, condition, location, and other factors. The prices here reflect what buyers are currently paying for used 2021 GMC Terrain models in typical condition when purchasing from a dealership. These prices are updated weekly.
Which Model is Right for Me?
Turbocharged 1.5-liter engine/9-speed automatic transmission
17-inch alloy wheels
Front-wheel drive
Apple CarPlay/Android Auto
GMC Pro Safety driver aids
Self-dimming rearview mirror
Eligible for other engines and all-wheel drive
Leather upholstery
Powered tailgate
8-inch touchscreen
Heated front seats
19-inch alloy wheels
LED headlights
Front/rear parking sensors
Blind-spot monitoring with rear cross-traffic alert
Driving the GMC Terrain
Making just 170 horsepower, the 2021 Terrain’s combination of 1.5-liter turbo-4 and 9-speed automatic transmission is best described as adequate. It’s rated to tow up to 1,500 pounds.
Around town or on the highway, the Terrain is comfortable and quiet. Attack a set of curves, and it’s nimble enough to be engaging, as opposed to wildly entertaining. That’s partly thanks to reinforcing up front that makes the steering feel confident. The 2021 Terrain Denali comes with a dedicated suspension setup that’s even more comfortable than the lower trims.
Interior Comfort
It’s quiet in here. Effective sound insulation, a supple ride, and well-cushioned seats make the 2021 Terrain’s cabin a pleasant environment, even if its design is not as well-considered as the exterior.
A few hard plastics in the lower areas of the dashboard and doors are reminders that this is a mainstream marque, not a luxury one. The embroidered headrests and stitched dashboard covering in the Denali bring a sophisticated air, though.
The rear seats don’t slide or recline, but the front seatback folds for some extra cargo versatility. Luggage space behind the rear seats measures 29.6 cubic feet. Folding them down creates a cargo area of 63.3 cubic feet. Neither figure compares well with the Honda CR-V or Toyota RAV4.
Exterior Styling
Lower trims of the GMC Terrain have simpler designs (but it could be argued, no less attractive), while the Denali is brighter and more ornate, from the grille and front bumper right back to the tail.
Overall, the Terrain sports sharp lines, highly stylized headlights with LED accents, and the current trend of rear pillar treatment that gives the impression of a floating roof.
The SLE and SLT trims are eligible for an Elevated Edition package that includes black-finished 19-inch alloy wheels and blacked-out exterior accents.
Favorite Features
STANDARD GMC PRO SAFETY
Standard in every 2021 Terrain, this array of safety features includes forward-collision mitigation with automatic emergency braking and pedestrian detection, lane-keeping assistance/lane-departure warning, and automatic high beams.
FLEXIBLE CARGO AREA
We hinted at the 2021 Terrain’s relatively smallish cargo area earlier, but it is a smart space, especially with the fold-flat front passenger seat offering extra versatility for carrying longer objects. There’s handy under-floor stowage as well.
Standard Features
At its entry level, which is the SL trim, the 2021 GMC Terrain has the turbocharged 1.5-liter 4-cylinder engine and front-wheel drive. It’s not eligible for all-wheel drive, the more powerful engine, nor several desirable options.
Even so, standard equipment levels include 17-inch alloy wheels, keyless entry/ignition, leather-wrapped steering wheel, active noise cancellation, active grille shutters, an infotainment system with a 7-inch touchscreen, Bluetooth phone and music streaming, Apple CarPlay/Android Auto smartphone integration, four USB ports, and the GMC Pro Safety package of driver assistance features (see the Safety Technology section below).
Factory Options
The SLE trim comes with a self-dimming rearview mirror and more available options. The SLT adds an 8-inch touchscreen, satellite radio, dual-zone automatic climate control, remote start, power-adjustable/heated front seats, leather upholstery, 18-inch wheels, and self-dimming side mirrors. Both trims may be ordered with the GMC Pro Safety Plus package (itemized in the Safety Technology section).
GMC’s Denali contains virtually everything as standard that might be optional in the lower trims, such as Bose audio, driver’ s-side memory settings, navigation, 360-degree camera system, and wireless charging. This trim also offers extras like heated outboard rear seats, ventilated front seats, a self-parking feature, and a premium suspension.
Engine & Transmission
A 1.5-liter turbocharged 4-cylinder, running on regular gasoline, is the sole Terrain engine for 2021. It is linked to a 9-speed automatic transmission.
Front-wheel drive (FWD) is the standard setup, but all-wheel drive (AWD) is optional with either engine.
1.5-liter turbocharged inline-4
170 horsepower @ 5,600 rpm
203 lb-ft of torque @ 2,000-4,000 rpm
EPA city/highway fuel economy: 25/30 mpg (FWD), 25/28 mpg (AWD)
2021 GMC Terrain
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2021 GMC Terrain Values and Prices
Style | Trade-In Value | Private Party Value | Fair Purchase Price | ||
|---|---|---|---|---|---|
$11,650 | $13,550 | $14,750 | |||
$11,700 | $15,500 | $16,850 | |||
$13,500 | $15,850 | $17,250 | |||
$17,700 | $18,600 | $20,300 |
2021 GMC Terrain Depreciation
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2021 GMC Terrain Annual Depreciation
Year | Vehicle Depreciation* | Resale Value | Trade-In Value | ||
|---|---|---|---|---|---|
2023 | $2,857 | $20,182 | $17,586 | ||
2024 | $2,999 | $17,183 | $14,620 | ||
2025 | $1,426 | $15,757 | $13,386 | ||
Now | $2,207 | $13,550 | $11,650 |
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2-Year Forecasted Depreciation
*Depreciation for the last 12 months of the private party resale value.
2021 GMC Terrain Depreciation
Annual Depreciation is an estimation of what your vehicle's value might be over time based on an average of similar vehicles. Estimations are calculated by comparing Kelley Blue Book Private Party Values of vehicles similar to yours over time, as well as forecasts from Manheim Auction data comparing current and projected auction values against current Kelley Blue Book Private Party and Trade-In Values. This is not a guarantee of actual depreciation. Local weather conditions, market factors and driver performance will also impact your vehicle's actual depreciation.
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Specifications
Dimensions, Weights & Capacities
Curb Weight | 3449 lbs. | ||
|---|---|---|---|
Fuel Capacity | 14.9 gallons | ||
Front Head Room | 40.0 inches | ||
Front Leg Room | 40.9 inches | ||
Max Seating Capacity | 5 | ||
Minimum Ground Clearance | 6.9 inches | ||
Overall Length | 182.3 inches | ||
Front Shoulder Room | 57.2 inches | ||
Towing Capacity, Maximum | 1500 lbs. | ||
Trunk or Cargo Capacity | 63.3 cu.ft. | ||
Turning Diameter | 37.4 feet | ||
Wheel Base | 107.3 inches | ||
Gross Vehicle Weight Rating (GVWR) | 4464 lbs. | ||
Payload Capacity | 1146 lbs. |
Exterior
Alloy Wheels | Available | ||
|---|---|---|---|
HID Headlights | Available | ||
Number of Doors | 4 doors | ||
Privacy Glass | Available |
Fuel Economy
City | 25 mpg | ||
|---|---|---|---|
Highway | 30 mpg | ||
Combined | 27 mpg |
Mechanical
Drivetrain | FWD | ||
|---|---|---|---|
Transmission Type | Automatic | ||
9 speed | Available | ||
Recommended Fuel | Regular | ||
Hill Descent Control | Available |
Performance
Horsepower | 170 @ 5600 RPM | ||
|---|---|---|---|
Torque | 203 @ 2000 rpm | ||
Engine | 4-Cyl, Turbo, 1.5 Liter |
Warranty
Basic | 3 years / 36000 miles | ||
|---|---|---|---|
Powertrain | 5 years / 60000 miles | ||
Corrosion | 3 years / 36000 miles |
Entertainment
Interior
Seating
Security
Technology
2021 GMC Terrain Safety
Safety Features & Technology
Teen Driver Technology
Teen Driver Technology
When a young driver asks to borrow the keys to your new Terrain, this feature allows owners to set up audio volume levels, speed alerts, and an in-vehicle report card. Standard throughout the 2021 Terrain range.
GMC Pro Safety
GMC Pro Safety
This array of driver aids is standard in the 2021 Terrain. Forward-collision mitigation with automatic emergency braking and pedestrian detection, lane-keeping assistance/lane-departure warning, and automatic high beams are all included.
GMC Pro Safety Plus
GMC Pro Safety Plus
This package is optional in the SLE and SLT trims. It contains blind-spot monitoring with rear cross-traffic and lane-change alerts, adaptive cruise control, Safety Alert Seat, and rear parking sensors.
Crash Test Rating
Compare to Similar Vehicles
![]() Used 2021 GMC Terrain | ![]() Used 2021 Ford Escape | ![]() Used 2021 Nissan Rogue | ![]() Used 2021 Chevrolet Equinox | ||
|---|---|---|---|---|---|
| Price | $14,750 | $13,850 | $18,250 | $16,050 | |
| KBB.com Rating | 4.2 | 3.9 | 4.5 | 4.3 | |
| Consumer Rating | 3.9 | 3.8 | 3.7 | 3.9 | |
| Fuel Economy | City 25/Hwy 30/Comb 27 MPG | City 28/Hwy 34/Comb 30 MPG | City 25/Hwy 32/Comb 28 MPG | City 26/Hwy 31/Comb 28 MPG | |
| Fuel Type | Gas | N/A | N/A | N/A | |
| Safety Rating | 5.0 | 5.0 | 4.0 | 5.0 | |
| Seating Capacity | 5 | 5 | 5 | 5 | |
| Basic Warranty | 3 years or 36000 miles | 3 years or 36000 miles | 3 years or 36000 miles | 3 years or 36000 miles | |
| Horsepower | 170 @ 5600 RPM | 181 @ 6000 RPM | 181 @ 6000 RPM | 170 @ 5600 RPM | |
| Engine | 4-Cyl, Turbo, 1.5 Liter | 3-Cyl, EcoBoost, Turbo, 1.5 Liter | 4-Cyl, 2.5 Liter | 4-Cyl, Turbo, 1.5 Liter | |
| Drivetrain | FWD | FWD | AWD | FWD |
2021 GMC Terrain Rankings
More GMC Terrain News & Information
GMC will offer upscale Denali and rugged AT4 trim levels of its Terrain compact SUV in 2026, and keep prices relatively stable.
The redesigned GMC Terrain sees a price bump of $1,300 for 2025.
GMC lifted the curtain on the 2025 Terrain today, giving its smallest SUV a much-needed update to stay competitive in…
FAQs
Is the 2021 GMC Terrain a good vehicle?
Yes, the 2021 GMC Terrain is a good car. Its Kelley Blue Book rating of 4.2 out of 5 is within 10% of our average rating.
What is the MPG for a 2021 GMC Terrain?
The 2021 GMC Terrain is rated to return city/highway fuel economy of 25/30 mpg.
How much should a 2021 GMC Terrain cost?
Used 2021 GMC Terrain prices currently range from $14,750 for the SL Sport Utility 4D to $20,300 for the Denali Sport Utility 4D when purchasing from a dealership, depending on a range of factors like equipment, mileage, and condition.
What's the cheapest GMC Terrain?
The cheapest 2021 GMC Terrain is the SL Sport Utility 4D, with a Kelley Blue Book Fair Purchase Price of $14,750.
Is the 2021 GMC Terrain reliable?
The 2021 GMC Terrain is part of the 2nd-generation Terrain, which our owners give an above-average reliability rating of 4 out of 5.







