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2020 GMC

Terrain FWD

Auto 9-spd, 4 cyl, 1.5 L, Turbo

GMC Terrain: best and worst years
2020 GMC Terrain FWD

Closest available photo (2019 model year); you're viewing the 2020.

2019 photoKevautoCC BY-SA 4.0Wikimedia Commons

Overview

Body
Small Sport Utility Vehicle 2WDEPA, from EPA, last updated 6/11/2026
Drivetrain
Front-Wheel DriveEPA, from EPA, last updated 6/11/2026
Transmission
Automatic 9-spdEPA, from EPA, last updated 6/11/2026
Powertrain
GasEPA, from EPA, last updated 6/11/2026
Fuel
RegularEPA, from EPA, last updated 6/11/2026

Engine & performance

HP
170
Power to weight
0.047 hp/lb
Axle ratio
3.47
Cyl
4EPA, from EPA, last updated 6/11/2026
Aspiration
TurbochargedEPA, from EPA, last updated 6/11/2026
Start-stop system
YesEPA, from EPA, last updated 6/11/2026

Efficiency

MPG Hwy
30 mpgEPA, from EPA, last updated 6/11/2026
MPG City
26 mpgEPA, from EPA, last updated 6/11/2026
MPG Comb
27 mpgEPA, from EPA, last updated 6/11/2026
Fuel $/yr
$2,300EPA, from EPA, last updated 6/11/2026
CO₂
325 g/miEPA, from EPA, last updated 6/11/2026
Eco Score
6/10EPA, from EPA, last updated 6/11/2026
Smog score
7/10
Elec. Range
0 miEPA, from EPA, last updated 6/11/2026
Real-world MPG
28.5 mpg, reported by 1 driverabout 1.5 mpg above the EPA combined estimate
SmartWay certified
No

Dimensions & capacity

Length
183 inNHTSA vPIC, from NHTSA vPIC, last updated 6/5/2026
Width
72 inNHTSA vPIC, from NHTSA vPIC, last updated 6/5/2026
Height
65 inNHTSA vPIC, from NHTSA vPIC, last updated 6/5/2026
Wheelbase
107 inNHTSA vPIC, from NHTSA vPIC, last updated 6/5/2026
Curb Weight
3,622 lbNHTSA vPIC, from NHTSA vPIC, last updated 6/5/2026
Pass. Vol
90 ft³EPA, from EPA, last updated 6/11/2026
Cargo Vol
13 ft³EPA, from EPA, last updated 6/11/2026

Safety NHTSA, model year

Overall crash rating
★★★★★
Rollover rating
★★★★
Stability control (ESC)
Standard
Forward-collision warning
Standard
Lane-departure warning
Standard
Recalls
2
Owner complaints
177
Reported injuries
5

Reported problems NHTSA owner complaints, model year

  • SERVICE BRAKES21%
  • ENGINE19%
  • UNKNOWN OR OTHER11%
  • ELECTRICAL SYSTEM9%
  • POWER TRAIN9%
  • FUEL/PROPULSION SYSTEM7%

Source: NHTSA owner complaints, 277 total.

GMC Terrain: best and worst years

Known issues manufacturer service bulletins, model year

616 service bulletins filed with NHTSA for this model year

  • Apr 1, 2026UNKNOWN OR OTHERPIT3271Q

    This preliminary information communicates information about how to determine if a wheel and tires size change is available.

  • Mar 27, 2026UNKNOWN OR OTHERPIT5992B

    This preliminary information discusses a condition that may arise from the drivers window switch sending an errant message causing the vehicle to enter manual fob learn mode.

  • Mar 9, 2026UNKNOWN OR OTHERPIP6104

    This Preliminary information communicates the steps on how to save a GDS2 Session Log and upload to a Technical Assistance Case in CX Connect.

  • Mar 9, 2026UNKNOWN OR OTHERPIP4902V

    This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance.

  • Mar 2, 2026UNKNOWN OR OTHERPIT6425D

    This Preliminary information communicates to the field on how to diagnosis a GPS issue with the Telematic module with no DTC'ss

  • Jan 16, 2026UNKNOWN OR OTHERPIT6425C

    This Preliminary information communicates to the field on how to diagnosis a GPS issue with the Telematic module with no DTC's

  • Jan 14, 2026UNKNOWN OR OTHERPIP6098

    This PI advised dealer technicians of possible causes of diesel fuel contamination in gasoline powered vehicles and advises of warranty direction.

  • Jan 8, 2026UNKNOWN OR OTHERPIP4902U

    This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance.

  • and 608 more

Source: NHTSA manufacturer communications (technical service bulletins).

Warranty manufacturer terms, by make

Basic
3 yr / 36k mi
Powertrain
5 yr / 60k mi
Roadside assistance
5 yr / 60k mi
Maintenance
1 yr / 12k mi
EV battery
8 yr / 100k mi

Information is gathered on a best-effort basis from public sources, may be incomplete or out of date, and is not purchasing or financial advice. Verify with the manufacturer or dealer before buying.