“Great value for the money, generally over-performs in fuel economy, great cargo storage features, sporty. Can't go wrong.”
2021 GMC Terrain: What's New, Specs & Features
Last updated August 13, 2026
The biggest change for the 2021 GMC Terrain is the loss of the stronger 2.0-liter turbo engine. Otherwise, this is a quiet year with no redesign or broad safety and infotainment update.
About the 2021 GMC Terrain
2nd generation (2018-2024), fourth model year, final pre-refresh version before the 2022 styling and tech update.
GMC positions the Terrain as a small SUV with a more upscale look and cabin feel than a typical mainstream crossover. GMC’s messaging centers on bold square-edged styling, flexible seating and cargo room, standard safety technology, and everyday comfort. For most buyers, the Terrain is a city-friendly five-seat family SUV that blends practical cargo flexibility with GMC’s truck-inspired design language and a slightly richer interior feel than many rivals.
Every 2021 Terrain is a five-seat small SUV powered by a 170-hp 1.5-liter turbo engine and nine-speed automatic. SL and SLE focus on everyday practicality, while SLT adds leather seating, an 8-inch touchscreen, and heated front seats. Denali brings a more upscale cabin, distinctive grille and lighting, and specially tuned suspension.
What changed, by category
Powertrain
GMC discontinued the 2.0-liter turbo engine. Every 2021 Terrain uses a 170-hp 1.5-liter turbo four-cylinder engine with a nine-speed automatic transmission.
Tech
The SLT's heated steering wheel changed from optional to standard equipment.
2021 GMC Terrain specs and features by trim
| Feature | ||||
|---|---|---|---|---|
| Engine | 4-Cyl, Turbo, 1.5 Liter | 4-Cyl, Turbo, 1.5 Liter | 4-Cyl, Turbo, 1.5 Liter | 4-Cyl, Turbo, 1.5 Liter |
| Transmission | Automatic, 9-Spd w/Overdrive 9T45 | Automatic, 9-Spd w/Overdrive 9T45 | Automatic, 9-Spd w/Overdrive 9T45 | Automatic, 9-Spd w/Overdrive 9T45 |
| Drivetrain | FWD | FWD | FWD | AWD |
| Fuel Type | Gas | Gas | Gas | Gas |
| MPG City | 25 mpg | 25 mpg | 25 mpg | 25 mpg |
| MPG Highway | 30 mpg | 30 mpg | 30 mpg | 30 mpg |
| Horsepower | 170 hp | 170 hp | 170 hp | 170 hp |
| Torque | 203 lb-ft | 203 lb-ft | 203 lb-ft | 203 lb-ft |
| Max Towing | 1500 lb | 1500 lb | 1500 lb | 1500 lb |
| Trunk/Cargo | 63.3 cu-ft | 63.3 cu-ft | 63.3 cu-ft | 63.3 cu-ft |
| Rear Legroom | 39.7 in | 39.7 in | 39.7 in | 39.7 in |
| Seats | 5 | 5 | 5 | 5 |
| Doors | 4 | 4 | 4 | 4 |
| Adaptive Cruise Control | ||||
| Alarm System | ||||
| Automatic Emergency Braking | ||||
| Automatic High Beams | ||||
| Blindspot Sensors | ||||
| Lane Departure Warning | ||||
| Park Assist | ||||
| Rear View Camera | ||||
| 360 Camera | ||||
| Alloy Wheels | ||||
| Auto-Dimming Exterior Mirrors | ||||
| Fog Lights | ||||
| HID Headlights | ||||
| LED Headlights | ||||
| Memory Exterior Mirrors | ||||
| Power Moonroof | ||||
| Power Liftgate/Trunk Release | ||||
| Roof Rails | ||||
| Side Steps | ||||
| Front DVD Entertainment System | ||||
| Navigation System | ||||
| Premium Audio | ||||
| Rear DVD Entertainment System | ||||
| SD Card Slot | ||||
| Satellite Radio | ||||
| Smartphone Interface | ||||
| Touch Screen Monitor | ||||
| Auto-Dimming Interior Mirror | ||||
| Dual Power Front Seats | ||||
| Dual-Zone Climate Control | ||||
| Heated Front Seats | ||||
| Heated Rear Seats | ||||
| Heated Steering Wheel | ||||
| Integrated Garage Door Opener | ||||
| Leather Seats | ||||
| Memory Driver's Seat | ||||
| Power Driver Seat | ||||
| Push-Button Engine Start | ||||
| Remote Start | ||||
| Ventilated Front Seats | ||||
Frequently asked questions
What is the biggest difference between the 2021 and 2020 GMC Terrain?
The biggest difference is that the 2021 Terrain no longer has the 2.0-liter turbo engine offered in 2020. All 2021 trims use the 170-hp 1.5-liter turbo engine and nine-speed automatic, and the SLT also gains a standard heated steering wheel.
Does the 2021 GMC Terrain Denali have the 2.0-liter turbo engine?
No. The 2021 Terrain Denali uses the same 170-hp 1.5-liter turbo engine and nine-speed automatic as every other Terrain trim that year.
Was the 2021 GMC Terrain redesigned?
No. The 2021 Terrain is the final pre-refresh version of the second generation, with no major styling, structural, safety-suite, or infotainment overhaul. The larger styling and technology update arrives for 2022.
Is the 2021 GMC Terrain worth considering over the 2020 model?
The 2021 Terrain makes the most sense if the 1.5-liter turbo meets your needs or if you want an SLT with a standard heated steering wheel. A 2020 Terrain with the stronger 2.0-liter turbo is the better fit for shoppers who value extra power or towing ability.
Does every 2021 GMC Terrain use the same engine?
Yes. Every 2021 Terrain trim—SL, SLE, SLT, and Denali—uses a 170-hp 1.5-liter turbo four-cylinder engine paired with a nine-speed automatic transmission.
2021 GMC Terrain Reviews
What owners are saying about the 2021 GMC Terrain.
4.2
2021 GMC Terrain
(97 reviews)
“Vehicle is reliable, easy to use and fun to drive. Everything is easily accessible.”
“For the price there is no comparison out there. The safety features, interior and overall look of the car is outstanding. The car drives smooth and quiet. Very impressive overall.”