2015 GMC Terrain MPG and Fuel Cost

The 2015 GMC Terrain is rated 19 to 26 mpg combined across 5 EPA-tested gas versions; the best is the 2.4L 4-cyl · FWD · 6-speed automatic · Flex-fuel (E85).

EPA fuel economy

2015 GMC Terrain · 5 EPA-tested versions

Best EPA rating

26MPG combined

22 city 31 highway

$2,600 a year to fuel

Fuel economy score6/10

2.4L 4-cyl · FWD · 6-speed automatic · Flex-fuel (E85)

Best version costs $1,000 more in fuel over 5 years vs the average new vehicle (EPA)

Fuel cost: 15,000 miles a year at EPA's $4.47 a gallon (regular gas).

Data: US EPA, fueleconomy.govUpdated Sep 30, 2026

At EPA's price assumptions, fuel costs $2,600 to $3,550 a year. Ratings for the best versions are unchanged from 2014.

Fewer complaints than a typical Terrain year

The 2015 drew 26 owner complaints in its first three years, against 34 for a typical Terrain year. Best years are picked only from 2016 on, since counts for older years say less: owners filed fewer complaints in the early 2010s.

No Terrain year stands out enough to avoid; best years: 2016, 2017, and 2021. Based on owner complaints, not adjusted for sales.

Every Terrain year ranked The 2015 Terrain's recalls and problems

Every 2015 Terrain version

EPA's ratings for each version it tested. Fuel cost is EPA's estimate for 15,000 miles a year at its current prices.

Version	Combined	City / Hwy	Fuel / year
2.4L 4-cyl · FWD · 6-speed automatic EPA listing: Terrain FWD	26 mpg	22 / 31	$2,600
2.4L 4-cyl · FWD · 6-speed automatic · Flex-fuel (E85) Best EPA listing: Terrain FWD · Flex-fuel (E85)	26 mpg	22 / 31	$2,600
2.4L 4-cyl · AWD · 6-speed automatic EPA listing: Terrain AWD	23 mpg	20 / 28	$2,900
3.6L 6-cyl · AWD · 6-speed automatic EPA listing: Terrain AWD	19 mpg	16 / 23	$3,550
3.6L 6-cyl · FWD · 6-speed automatic EPA listing: Terrain FWD	19 mpg	17 / 24	$3,550

Fuel cost at your prices

EPA's annual cost uses 15,000 miles a year, 55% city driving and its current prices: $4.47 a gallon for regular gas. Change the numbers to match your driving.

Version	Per year	Per month	5 years
2.4L 4-cyl · FWD · 6-speed automatic · Flex-fuel (E85)	$2,579	$215	$12,894
2.4L 4-cyl · FWD · 6-speed automatic	$2,579	$215	$12,894
2.4L 4-cyl · AWD · 6-speed automatic	$2,915	$243	$14,576
3.6L 6-cyl · AWD · 6-speed automatic	$3,529	$294	$17,645
3.6L 6-cyl · FWD · 6-speed automatic	$3,529	$294	$17,645

At the default settings the results match EPA's annual cost before EPA rounds it to the nearest $50.

GMC Terrain MPG by model year

The best-rated version in each model year; the highlighted year is this page. Gas: 25 to 28 mpg (every year from 2010 to 2026); highest in 2018. Diesel: 32 mpg (2018 to 2019).

Best gas version
Best diesel version

2015: gas 26 mpg · diesel not offered

Show as a table

GMC Terrain best combined mpg by model year
Model year	Best gas version	Best diesel version
2010	26	–
2011	26	–
2012	26	–
2013	26	–
2014	26	–
2015	26	–
2016	26	–
2017	25	–
2018	28	32
2019	28	32
2020	27	–
2021	27	–
2022	27	–
2023	26	–
2024	26	–
2025	27	–
2026	27	–

Every Terrain year's ratings in one table

How the 2015 Terrain compares

2015 compact SUVs covered on this site, ranked by their best combined rating. Fuel cost is for each model's cheapest version to run, at EPA's prices.

2015 model	Best combined	Best gas	Fuel / year
Honda CR-V Best: gas	29 mpg	29 mpg	$2,300
Mazda CX-5 Best: gas	29 mpg	29 mpg	$2,300
Nissan Rogue Best: gas	28 mpg	28 mpg	$2,400
Subaru Outback Best: gas	28 mpg	28 mpg	$2,400
Subaru Forester Best: gas	27 mpg	27 mpg	$2,500
Toyota RAV4 Best: gas	26 mpg	26 mpg	$2,600
Chevrolet Equinox Best: gas	26 mpg	26 mpg	$2,600
Ford Escape Best: gas	26 mpg	26 mpg	$2,600
GMC Terrain This page Best: gas	26 mpg	26 mpg	$2,600
Hyundai Tucson Best: gas	25 mpg	25 mpg	$2,700
Jeep Compass Best: gas	25 mpg	25 mpg	$2,700
Jeep Cherokee Best: gas	25 mpg	25 mpg	$2,700
Kia Sportage Best: gas	23 mpg	23 mpg	$2,900
Volkswagen Tiguan Best: gas	23 mpg	23 mpg	$3,550

2015 Terrain recalls and complaints

NHTSA lists 3 safety recalls and 297 owner complaints for the 2015 Terrain.

Owners most often describe wiper failures (100 complaints, 34%), then stalling (35). NHTSA's overall crash rating: 4 stars.

See the 2015 Terrain recalls and problems

Questions

Does AWD lower the 2015 GMC Terrain's gas mileage?

Sometimes. On versions that differ only in drive, the gap ranges from 0 to 3 mpg combined: the 2.4L 4-cyl gets 26 mpg combined with front-wheel drive and 23 with AWD.

Does the 2015 GMC Terrain need premium gas?

No. EPA lists every 2015 GMC Terrain version on regular gasoline.

How does the 2015 Terrain's MPG compare with the 2014?

For 2015, the best gas version is rated 26 mpg, the same as the year before.

Sources and method

US EPA and Department of Energy fuel economy data (fueleconomy.gov), file dated Sep 29, 2026.
EPA fuel price assumptions: regular $4.47, midgrade $5.07, premium $5.48, diesel $6.38 a gallon; electricity $0.15 per kWh.
Recall and complaint counts: NHTSA recall file dated Oct 2, 2026 and complaint file dated Oct 2, 2026.

Ratings are EPA estimates. Real-world mileage depends on how, where and in what weather you drive. How we build these pages. Spotted an error? Tell us.