2023 GMC Terrain — Full Specifications
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The 2023 GMC Terrain is an SUV powered by a 1.5L 4-cyl turbo regular gasoline engine. It returns around 31 mpg (UK) / 26 mpg (US EPA) combined. Owners often keep a GMC Terrain workshop manual to hand for servicing and repairs.
Compared with the 2022 GMC Terrain: Fuel economy is essentially unchanged at around 31 mpg (UK) combined. The engine line-up listed by EPA is unchanged. It carries the same 5★ overall NHTSA rating.
Full Specifications
| Engine | 1.5L 4-cyl turbo |
|---|---|
| Transmission | Automatic 9-spd |
| Fuel Type | Regular Gasoline |
| Powertrain | Conventional |
| Drive | Front-Wheel Drive |
| Body Style | SUV |
| Length | 4707 mm |
| Height | 1684 mm |
| Passenger Volume (EPA) | 104 cu ft (2,945 L) |
| Luggage Volume (EPA) | 30 cu ft (850 L) |
| Fuel Economy (UK) | 31 combined / 29 urban / 35 extra-urban mpg |
| Fuel Economy (US EPA) | 26 combined / 24 city / 29 highway mpg |
| CO₂ Emissions | 210 g/km |
| EPA Greenhouse Gas Score | 5 / 10 (10 = lowest emissions) |
| EPA Est. Annual Fuel Cost | $2,600 (15,000 mi/yr, US prices) |
Engine & Transmission Options
EPA lists 2 configurations for the 2023 GMC Terrain, all with the 1.5L 4-cyl turbo engine. The headline figures at the top of this page describe the most fuel-efficient configuration.
| Engine | Transmission | Drive | MPG (UK) | MPG (US) | CO₂ g/km | Fuel cost / yr |
|---|---|---|---|---|---|---|
| 1.5L 4-cyl turbo | Automatic 9-spd | All-Wheel Drive | 31 | 26 (24/28) | 216 | $2,600 |
| 1.5L 4-cyl turbo | Automatic 9-spd | Front-Wheel Drive | 31 | 26 (24/29) | 210 | $2,600 |
MPG (US) shows combined, with city/highway in brackets. Highlighted row = the configuration used for the headline figures. Source: US EPA fueleconomy.gov.
EPA measures interior passenger volume at 104 cubic feet (about 2,945 litres) and luggage volume at 30 cubic feet (about 850 litres). These are US EPA interior-volume figures; they are measured differently from the boot capacity numbers UK manufacturers quote.
Owner Essentials for the 2023 GMC Terrain
Running Costs: 2023 GMC Terrain
Covering around 8,000 miles a year in a 2023 GMC Terrain at 31 mpg combined, expect roughly 1,173 litres of fuel annually — multiply by your local price per litre for a cost estimate. For US owners, the EPA estimates about $2,600 a year in fuel for the most efficient configuration (15,000 miles, national average prices). Work out exact fuel costs with the fuel cost calculator on 247Calculators.
Convert between MPG and L/100km with the unit converters on 247QuickTools. Not sure what tyre size fits? 247TyreCheck explains tyre sizing.
Planning a road trip? Grab a road trip packing list. Only need this car occasionally? See our buy vs rent comparison.
2023 GMC Terrain Safety Ratings (NHTSA)
Recalls & Owner Complaints (NHTSA)
NHTSA lists 2 safety recall campaigns that include the 2023 GMC Terrain (as of 6 October 2026). Most affected areas: Child seat (1), Air bags (1). A campaign often covers several model years or models, so check your own VIN to see whether your car is affected.
- Child seat — campaign 23V339000, reported 11 May 2023. Risk: The inability to install a child seat with the LATCH anchorage bars could result in an unsecured child seat, increasing the risk of injury in a crash.
- Air bags — campaign 22V929000, reported 15 December 2022. Risk: In the event of a crash, a front passenger air bag that deploys with a child or infant in the front passenger seat can increase their risk of injury.
Owners have filed 40 complaints with NHTSA about the 2023 GMC Terrain. The most-reported areas are Fuel/propulsion system (16), Engine (15), Power train (8). Complaints include 2 reported crashes, 1 reported fire, 1 reported injury. That is well below the median of 185 complaints across the 17 GMC Terrain model years in our data.
Used-buyer checklist for the 2023 GMC Terrain
Based on where NHTSA recalls and owner complaints cluster for this model year, these are the areas worth checking before you buy:
- Fuel system (16 owner complaints) — Ask whether any fuel-pump or fuel-system recalls were completed, and watch for hard starting or stalling.
- Engine (15 owner complaints) — Listen for unusual noise on a cold start, check for warning lights and ask for the service records.
- Air bags (1 recall campaign) — Confirm any air bag inflator or module recalls were completed — enter the VIN at nhtsa.gov/recalls.
- Transmission & drivetrain (8 owner complaints) — On the test drive, watch for hesitation, jerking or slipping between gears and ask for transmission service history.
Source: US NHTSA recall and consumer-complaint databases, retrieved 6 October 2026. Complaints are unverified owner reports, not confirmed defects. Check any vehicle by VIN at nhtsa.gov/recalls, and see our guide to checking a used car for recalls.
How It Compares
How does the GMC Terrain compare to similar SUVs? For context, SUVs in our database average around 27 mpg (UK) combined — this model's 31 mpg figure is 4 mpg better than that average. Its 210 g/km CO₂ figure is 43 g/km lower than the 253 g/km average for SUVs on this site. This comparison is based on 1824 SUVs in our dataset.
GMC models in our database average about 26 mpg (UK) combined on their most efficient configuration; the 2023 GMC Terrain's 31 mpg is 5 mpg above that make average. Its 210 g/km CO₂ figure is 62 g/km lower than the 272 g/km GMC average.
Of the 17 GMC Terrain model years we cover, the 2023 ranks 8th for combined fuel economy on its best configuration (31 mpg UK combined, against a high of 38 mpg). See every GMC Terrain year side by side.
Last updated: · Data: US EPA (fueleconomy.gov) and NHTSA safety ratings 18 July 2026; NHTSA recalls and complaints 6 October 2026; Wikidata & curated EU catalogue 18 July 2026; European generation and engine data from Wikipedia 7 October 2026
Vehicle data sourced from manufacturer specifications. Always verify with your vehicle handbook or a qualified mechanic. This is a reference tool, not professional advice.
Recommended Accessories for the 2023 GMC Terrain
Frequently Asked Questions
What engine does the 2023 GMC Terrain have?
It's fitted with a 1.5L 4-cyl turbo regular gasoline engine, paired with a automatic 9-spd transmission.
What is the fuel economy of the 2023 GMC Terrain?
The most efficient configuration returns around 31 mpg (UK) combined, or 26 mpg on the US EPA cycle.
How much does the 2023 GMC Terrain cost to fuel per year?
The US EPA estimates about $2,600 a year in fuel for the most efficient configuration, based on 15,000 miles of mixed driving and national average fuel prices. Your own cost will depend on mileage and local prices.
Does the 2023 GMC Terrain have a good safety rating?
It holds an overall NHTSA rating of 5 stars, with 5 stars for frontal crash protection.
Does the 2023 GMC Terrain have any recalls?
NHTSA lists 2 safety recall campaigns that include the 2023 GMC Terrain (as of 6 October 2026). Most affected areas: Child seat (1), Air bags (1). A campaign often covers several model years or models, so check your own VIN to see whether your car is affected.
What are the most common problems reported for the 2023 GMC Terrain?
Among the 40 owner complaints filed with NHTSA, the most-reported areas are Fuel/propulsion system (16 complaints), Engine (15 complaints), Power train (8 complaints). Complaints are unverified owner reports, not confirmed defects, and raw counts rise with how many cars were sold.
How much interior and luggage space does the 2023 GMC Terrain have?
EPA measures interior passenger volume at 104 cubic feet (about 2,945 litres) and luggage volume at 30 cubic feet (about 850 litres). These are US EPA interior-volume figures, which are measured differently from the UK boot-capacity numbers manufacturers quote.
Is the GMC Terrain's fuel economy good for an SUV?
Yes — it returns around 31 mpg (UK) combined, against a same-body-style average of roughly 27 mpg among the SUVs we track, making it one of the more efficient options in its class.