"How reliable is the 2020 Gmc Terrain?"

"Based on 256 NHTSA complaints, the 2020 Gmc Terrain has a median complaint mileage of 42255 miles. The most common issue is Service Brakes."

"What are common problems with the 2020 Gmc Terrain?"

"The most frequently reported component in NHTSA complaints for the 2020 Gmc Terrain is Service Brakes, accounting for a significant portion of the 256 total complaints filed."

2020 Gmc Terrain: Reliability Data

Source: NHTSA — 256 complaints

256

Total Complaints

42,255mi

Median Mileage

Service Brakes

Top Issue

Crash Reports

When Do Complaints Happen?

Distribution of NHTSA complaints by vehicle mileage at time of report.

5,000 25th Percentile

42,255 Median Mileage

70,000 75th Percentile

What Fails?

Most reported component issues from NHTSA complaints.

Service Brakes

Engine

Unknown Or Other

Power Train

Electrical System

Fuel/Propulsion System

Vehicle Speed Control

Service Brakes, Hydraulic

Automatic Emergency Braking

Steering

Severity Assessment

Crashes

Fires

Injuries

Deaths

Sample Complaint Reports

"WHEN CRUISE CONTROL IS ENGAGED AT 71MPH, HOLDING +RES BUTTON TO INCREASE SPEED AND RELEASING IT AT 77MPH SETS CRUISE SPEED TOO HIGH. CAR CONTINUES TO ACCELERATE. CRUISE GETS SET AT 100MPH AND ACCELERATES MORE THEN DESIRED. SEE LINK WITH VIDEO OF EVENT HTTPS://PHOTOS.APP.GOO.GL/O7ZGEQWCSU7KYCV58..."

"THE COMPLAINT I HAVE IS THE INSIDE FRONT OF THE CAR IS TOO SMALL AND I CANT REACH THE GAS PEDAL EXCEPT WITH MY TOE. MY FOOT KEEPS SLIPPING OFF AS I AM DRIVING. I HAVE TO HAVE THE SEAT WAY UP OR I CANT REACH. I AM 5 FOOT TALL WOMAN. THIS IS A RIDICULOUS THING THAT I HAVE TO PUT UP. I DROVE IT FOR 1..."

Source: NHTSA ODI Complaints Database. Names and identifying details omitted.

When Were Complaints Filed?

Number of complaints by the year the issue occurred.

When Does Each Component Fail?

Median mileage at complaint for top components.

Service Brakes 51 complaints

25th: 21,736 mi Median: 34,415 mi 75th: 42,500 mi

Engine 47 complaints

25th: 48,552 mi Median: 67,000 mi 75th: 88,000 mi

Power Train 24 complaints

25th: 16,250 mi Median: 53,500 mi 75th: 84,750 mi

Electrical System 24 complaints

Median: 5,600 mi

Where Are Complaints Coming From?

Top states by complaint count.

OH: 32 MI: 26 TX: 18 NY: 16 FL: 16 CA: 14 VA: 12 AL: 12 PA: 11 SD: 9

Who Files Complaints?

0.4%

Original Owners

99.6%

Second+ Owners

Gmc Terrain — Other Years

See how this model compares across different model years.

Year	Complaints	Median Mileage	Top Issue	Crashes
2010	425	72,000	Engine	17
2011	556	77,800	Engine	20
2012	498	80,170	Engine	30
2013	483	77,000	Engine	18
2014	385	75,000	Engine	7
2015	377	60,000	Visibility/Wiper	12
2016	174	51,000	Visibility/Wiper	12
2017	178	46,580	Engine	20
2018	312	15,615	Service Brakes	22
2019	275	17,000	Engine	7
2021	48	78,843	Power Train	6
2022	54	22,000	Fuel/Propulsion System	0
2023	42	24,000	Engine	4
2024	56	5,276	Power Train	0

Data source: View this vehicle on NHTSA.gov | NHTSA ODI Complaints Database. Public domain.

Methodology: Complaint counts and mileage distributions are computed directly from consumer-reported NHTSA complaints. This data represents reported issues, not failure rates — vehicles without complaints are not represented. Full methodology.

Data through: 2026-03-28