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2027 GMC Terrain Specs: MPG, Gas Mileage, Engine Size & Dimensions

2015–2027 model years47 variantsUp to 32 MPG combined
Real-World MPG QuestionsBed Dimensions & Cargo SpaceService Intervals

GMC Terrain maintenance schedule by model year

Verified year-by-year intervals for 2018–2020 are listed on the GMC Terrain maintenance schedule, where you can switch model year in the table.

2027 GMC Terrain Specs at a Glance

The 2027 GMC Terrain gets 26 mpg combined on the 1.5L Front-Wheel Drive configuration, weighs 3,801 lbs, measures 183.1 in long. Figures are per configuration, not a single official number — other trims rate as low as 25 mpg combined. Every figure below comes from EPA, NHTSA, or manufacturer published data — no estimates.

Combined MPG
26 mpg (25 city / 28 hwy)
Best configuration: 1.5L · Front-Wheel Drive · Automatic 8-spd · other 2027 trims rate 25–26 mpg combined
Engine
1.5L 4-cyl
1.5L · Front-Wheel Drive · Automatic 8-spd
Curb weight
3,801 lbs
Heaviest recorded configuration: TERRAIN 4DR SUV AWD DENALI
Length
183.1 in · 74.4 in wide · 65.7 in tall
Wheelbase
107.5 in
NHTSA overall
5-star (2024)

2027 GMC Terrain trims and MPG

TrimEngineTransDriveCityHwyCombined
Auto 8-spd, 4 cyl, 1.5 L4 · 1.5LAutomatic 8-spdAll-Wheel Drive242625
Auto 8-spd, 4 cyl, 1.5 L4 · 1.5LAutomatic 8-spdFront-Wheel Drive252826
Auto 8-spd, 4 cyl, 1.5 L4 · 1.5LAutomatic 8-spdAll-Wheel Drive242825

Detailed Specifications

MPG & Fuel Economy

MPG for every year and trim

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Engine Specifications

Engine Specs for every year and trim

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Annual Fuel Cost

Fuel Cost for every year and trim

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Transmission Specifications

Transmission for every year and trim

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Drivetrain & Drive Type

Drivetrain for every year and trim

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Vehicle Class & EPA Size Category

Vehicle Class for every year and trim

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Maintenance Schedule & Service Intervals

Maintenance for every year and trim

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Dimensions & Size

Dimensions for every year and trim

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Curb Weight

Curb Weight for every year and trim

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NHTSA Safety Ratings

Safety for every year and trim

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GMC Terrain Generations

Grouped by year ranges where the engine lineup, drivetrain options, and EPA class stay consistent — a derived approximation of the factory generations, not a manufacturer-published list.

YearsVariantsEnginesDriveClassBest MPG
2018–2027321.5L, 1.6L, 2.0LAll-Wheel Drive, Front-Wheel DriveSmall Sport Utility Vehicle 2WD, Small Sport Utility Vehicle 4WD32
2015–2017152.4L, 3.6LAll-Wheel Drive, Front-Wheel DriveSmall Sport Utility Vehicle 2WD, Small Sport Utility Vehicle 4WD26

GMC Terrain — All Years Overview

YearTrimEngineTransDriveCityHwyCombinedFuel
2027Auto 8-spd, 4 cyl, 1.5 L4 · 1.5LAutomatic 8-spdAll-Wheel Drive242625Regular Gasoline
2027Auto 8-spd, 4 cyl, 1.5 L4 · 1.5LAutomatic 8-spdFront-Wheel Drive252826Regular Gasoline
2027Auto 8-spd, 4 cyl, 1.5 L4 · 1.5LAutomatic 8-spdAll-Wheel Drive242825Regular Gasoline
2026Auto (variable gear ratios), 4 cyl, 1.5 L4 · 1.5LAutomatic (variable gear ratios)Front-Wheel Drive262827Regular Gasoline
2026Auto 8-spd, 4 cyl, 1.5 L4 · 1.5LAutomatic 8-spdAll-Wheel Drive242825Regular Gasoline
2026Auto 8-spd, 4 cyl, 1.5 L4 · 1.5LAutomatic 8-spdAll-Wheel Drive242625Regular Gasoline
2025Auto (variable gear ratios), 4 cyl, 1.5 L4 · 1.5LAutomatic (variable gear ratios)Front-Wheel Drive262827Regular Gasoline
2025Auto 8-spd, 4 cyl, 1.5 L4 · 1.5LAutomatic 8-spdAll-Wheel Drive242825Regular Gasoline
2024Auto 9-spd, 4 cyl, 1.5 L4 · 1.5LAutomatic 9-spdFront-Wheel Drive242926Regular Gasoline
2024Auto 9-spd, 4 cyl, 1.5 L4 · 1.5LAutomatic 9-spdAll-Wheel Drive232825Regular Gasoline
2023Auto 9-spd, 4 cyl, 1.5 L4 · 1.5LAutomatic 9-spdAll-Wheel Drive242826Regular Gasoline
2023Auto 9-spd, 4 cyl, 1.5 L4 · 1.5LAutomatic 9-spdFront-Wheel Drive242926Regular Gasoline
2022Auto 9-spd, 4 cyl, 1.5 L4 · 1.5LAutomatic 9-spdFront-Wheel Drive253027Regular Gasoline
2022Auto 9-spd, 4 cyl, 1.5 L4 · 1.5LAutomatic 9-spdAll-Wheel Drive252826Regular Gasoline
2021Auto 9-spd, 4 cyl, 1.5 L4 · 1.5LAutomatic 9-spdFront-Wheel Drive253027Regular Gasoline
2021Auto 9-spd, 4 cyl, 1.5 L4 · 1.5LAutomatic 9-spdAll-Wheel Drive252826Regular Gasoline
2020Auto 9-spd, 4 cyl, 1.5 L4 · 1.5LAutomatic 9-spdFront-Wheel Drive263027Regular Gasoline
2020Auto 9-spd, 4 cyl, 1.5 L4 · 1.5LAutomatic 9-spdAll-Wheel Drive252826Regular Gasoline
2020Auto 9-spd, 4 cyl, 2.0 L4 · 2.0LAutomatic 9-spdFront-Wheel Drive222824Premium Gasoline
2020Auto 9-spd, 4 cyl, 2.0 L4 · 2.0LAutomatic 9-spdAll-Wheel Drive212623Premium Gasoline
2019Auto 6-spd, 4 cyl, 1.6 L4 · 1.6LAutomatic 6-spdAll-Wheel Drive283832Diesel
2019Auto 6-spd, 4 cyl, 1.6 L4 · 1.6LAutomatic 6-spdFront-Wheel Drive283932Diesel
2019Auto 9-spd, 4 cyl, 1.5 L4 · 1.5LAutomatic 9-spdFront-Wheel Drive263028Regular Gasoline
2019Auto 9-spd, 4 cyl, 1.5 L4 · 1.5LAutomatic 9-spdAll-Wheel Drive242826Regular Gasoline
2019Auto 9-spd, 4 cyl, 2.0 L4 · 2.0LAutomatic 9-spdFront-Wheel Drive222824Premium Gasoline
2019Auto 9-spd, 4 cyl, 2.0 L4 · 2.0LAutomatic 9-spdAll-Wheel Drive212623Premium Gasoline
2018Auto 6-spd, 4 cyl, 1.6 L4 · 1.6LAutomatic 6-spdAll-Wheel Drive283832Diesel
2018Auto 6-spd, 4 cyl, 1.6 L4 · 1.6LAutomatic 6-spdFront-Wheel Drive283932Diesel
2018Auto 9-spd, 4 cyl, 1.5 L4 · 1.5LAutomatic 9-spdAll-Wheel Drive242826Regular Gasoline
2018Auto 9-spd, 4 cyl, 1.5 L4 · 1.5LAutomatic 9-spdFront-Wheel Drive263028Regular Gasoline
2018Auto 9-spd, 4 cyl, 2.0 L4 · 2.0LAutomatic 9-spdFront-Wheel Drive222824Premium Gasoline
2018Auto 9-spd, 4 cyl, 2.0 L4 · 2.0LAutomatic 9-spdAll-Wheel Drive212623Premium Gasoline
2017Auto 6-spd, 4 cyl, 2.4 L4 · 2.4LAutomatic 6-spdFront-Wheel Drive213125Regular Gasoline
2017Auto 6-spd, 4 cyl, 2.4 L4 · 2.4LAutomatic 6-spdAll-Wheel Drive202823Regular Gasoline
2017Auto 6-spd, 4 cyl, 2.4 L4 · 2.4LAutomatic 6-spdFront-Wheel Drive213125Regular Gasoline
2017Auto 6-spd, 6 cyl, 3.6 L6 · 3.6LAutomatic 6-spdFront-Wheel Drive172420Regular Gasoline
2017Auto 6-spd, 6 cyl, 3.6 L6 · 3.6LAutomatic 6-spdAll-Wheel Drive162318Regular Gasoline
2016Auto 6-spd, 4 cyl, 2.4 L4 · 2.4LAutomatic 6-spdFront-Wheel Drive223126Regular Gasoline
2016Auto 6-spd, 4 cyl, 2.4 L4 · 2.4LAutomatic 6-spdAll-Wheel Drive202823Regular Gasoline
2016Auto 6-spd, 4 cyl, 2.4 L4 · 2.4LAutomatic 6-spdFront-Wheel Drive223126Regular Gasoline
2016Auto 6-spd, 6 cyl, 3.6 L6 · 3.6LAutomatic 6-spdFront-Wheel Drive172420Regular Gasoline
2016Auto 6-spd, 6 cyl, 3.6 L6 · 3.6LAutomatic 6-spdAll-Wheel Drive162318Regular Gasoline
2015Auto 6-spd, 4 cyl, 2.4 L4 · 2.4LAutomatic 6-spdAll-Wheel Drive202823Regular Gasoline
2015Auto 6-spd, 4 cyl, 2.4 L4 · 2.4LAutomatic 6-spdFront-Wheel Drive223126Regular Gasoline
2015Auto 6-spd, 4 cyl, 2.4 L4 · 2.4LAutomatic 6-spdFront-Wheel Drive223126Regular Gasoline
2015Auto 6-spd, 6 cyl, 3.6 L6 · 3.6LAutomatic 6-spdFront-Wheel Drive172419Regular Gasoline
2015Auto 6-spd, 6 cyl, 3.6 L6 · 3.6LAutomatic 6-spdAll-Wheel Drive162319Regular Gasoline

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GMC Terrain — Frequently Asked Questions

What is the fuel economy of the 2027 GMC Terrain?

The GMC Terrain is EPA-rated at up to 32 MPG combined (28 city / 38 highway), a historical peak recorded on the 2019 model year.

What engine does the 2027 GMC Terrain have?

The GMC Terrain uses a 1.5L 4-cylinder engine paired with an Automatic 8-spd transmission.

What years of the GMC Terrain are covered here?

This page documents 47 verified GMC Terrain configurations across model years 2015–2027.

Which model year of the GMC Terrain is the most fuel efficient?

The 2019 GMC Terrain holds the highest combined rating at 32 MPG; the 2017 sits lowest at 25 MPG, a difference of 7 MPG (about 28%) across the 13 rated years on file.

How many engine options does the GMC Terrain have?

The records list 5 distinct displacements for the GMC Terrain — 1.5L, 1.6L, 2L, 2.4L, 3.6L — which is why combined MPG varies between trims of the same year.

Is the 2027 GMC Terrain front-wheel drive or all-wheel drive?

The GMC Terrain appears in 2 drivetrain layouts across the years documented here — All-Wheel Drive, Front-Wheel Drive — with the latest 2027 record on All-Wheel Drive.

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