Skip to content
GMC TerrainModel year report

2026 GMC Terrain Problems

Compared with other GMC Terrain years

Too new to compare

Nearby years with fewer complaints than typical and no open NHTSA investigation: 2023

Based only on NHTSA complaints, recalls and investigations. Not adjusted for how many vehicles were sold, and not a reliability rating. How this is calculated

Complaints
33filed with NHTSA
Median mileage
3,000miles, 7 complaints with mileage
Recalls
1campaigns on record
Trend
Too newThis model year is less than 4 years old, so a trend is not meaningful yet.
NHTSA crash rating
—no overall rating published
EPA fuel economy
27 mpgcombined, 1.5L 4-cyl FWD · 26 city / 28 hwy

Sources: NHTSA records for the 2026 GMC Terrain (complaints, recalls, investigations), NHTSA crash tests, EPA fuel economy. Report an error

NHTSA recorded 33 consumer complaints for the 2026 GMC Terrain. The part named most often is other or unknown, with 9 complaints (27% of the total), followed by forward collision avoidance (6) and electrical system (5). 7 of the complaints include a mileage, and 100% of those were filed for vehicles with under 50,000 miles; the median is 3,000 miles. Of all complaints, 1 involved a crash, 2 a fire, 1 an injury, according to the filers. NHTSA lists 1 recall campaign and 173 technical service bulletins for this model year. Other or unknown complaints overlap with 159 technical service bulletins filed under the same part. Forward collision avoidance complaints overlap with 1 technical service bulletin filed under the same part.

Which parts are reported most

Complaints can name more than one part, so the counts add up to more than the total. Select a part to see its complaints, recalls and bulletins.

Also reported: Back-over prevention (rear camera) (1), Engine (1), Latches, locks and linkages (1), Vehicle speed control (1), Visibility (wipers, defrost, mirrors) (1).

Example complaints

Other or unknown: “I bought this car new from Davidson's in Rome, NY in early March 2026. This is a 2026 model. Two days after I took possession, I noticed that the spare tire well was halfway full of solid ice. The car has a severe leak through the back right side window. The dealer states it needs to be replaced. The interior frames of the car were loaded with water for many weeks as it stood on the lot. …”

NHTSA complaint #11732320, filed 2026-04

Forward collision avoidance: “Two issues here. First is that the car will give a danger warning when nothing is there. Sometimes goes as far as slamming on my breaks. Both in drive and reverse. Second is the lane keep assist. It’s like it is working backwards. I turned this all off because it would jerk me out of the lane and into the other lane or off to the sides of the road.”

NHTSA complaint #11737214, filed 2026-05

Electrical system: “The vehicle has been taken to the dealership at least 4 times. Each time for the same reason: when driving at 65 or higher, it sounds like it's on a flat. My screen also glitches when foot is taken off the break after a stop. The service advisor told me that there was a shortage of mechanics and asked me to bring it back next week (this is the response I have gotten each time). I have asked for a loaner twice and was told that there were none available. Therefore, I had to pay $40 to uber to work. Today, I said that I couldn't come back because it's the same issue and I have to work next week. …”

NHTSA complaint #11707645, filed 2025-12

Suspension: “My vehicle is making a squeaky sound/noise when breaking and getting louder. I took it in for service and they couldn’t seem to find the issue. It’s coming from the front end of the vehicle”

NHTSA complaint #11765446, filed 2026-09

Mileage when problems were reported

100% of the 7 complaints with a mileage were filed for vehicles with under 50,000 miles; the middle half falls between 2,500 and 5,200 miles.

86%0–1014%10–250%25–500%50–750%75–1000%100–1500%150+
Share of complaints by mileage when the problem was reported, in thousands of miles (7 complaints with mileage). Red bars: under 50,000 miles. Bucket widths differ. Median: 3,000 miles.

Complaints by year filed

This model year is less than 4 years old, so a trend is not meaningful yet.

2025202629
Complaints by year the complaint was filed with NHTSA. Red bars: the last 3 full calendar years used for the trend. The current year (2026) is partial.

Crash test ratings

NHTSA's 5-Star Safety Ratings for the 2026 GMC Terrain. Frontal results are shown driver / passenger; rollover shows the star rating and NHTSA's estimated risk of rolling over in a single-vehicle crash.

VersionOverallFrontalSideSide poleRollover
Terrain · SUV AWDnot rated—554 · 17.4% risk
Terrain · SUV FWDnot rated—554 · 18.5% risk

Driver aids listed by NHTSA for the 2026 model year: forward collision warning standard, lane departure warning standard, automatic emergency braking standard.

Source: NHTSA New Car Assessment Program (5-Star Safety Ratings), nhtsa.gov/ratings.

Fuel economy and running cost

EPA ratings for each 2026 GMC Terrain version. Annual fuel cost is the EPA's estimate at its current fuel prices for 15,000 miles a year (55% city driving).

VersionEngineTransmissionCityHwyComb.Fuel / yr
Terrain AWD1.5L 4-cyl8-speed automatic242825$2,700
Terrain AWD Denali/AT41.5L 4-cyl8-speed automatic242625$2,700
Terrain FWD1.5L 4-cylCVT262827$2,500

Source: U.S. EPA and Department of Energy, fueleconomy.gov. Ratings are for comparing vehicles; real-world mileage varies with driving and conditions.

Recalls and investigations

Recall details for the 2026 GMC Terrain → · Check a VIN at nhtsa.gov/recalls

Technical service bulletins

TSBs are manufacturer notes to dealers about known repair procedures. They are not recalls and do not by themselves mean a vehicle has a fault. 173 on record; the latest 10 are shown.

See all 173 bulletins →

Other model years of the GMC Terrain

YearComplaintsMedian miRecallsCrash ★MPGScore (50 = typical)Trend
2026333,0001—27Too new to compareToo new
2025131,1260—27—Too new
2024538,3831526Too new to compareToo new
20234125,500252611 · FewerToo new
20226049,00025270 · FewerRising
20213657,42225272 · FewerRising
202019747,734252758 · TypicalRising
201918719,500352869 · MoreRising
201822618,75054–52887 · MoreRising
201713548,85014259 · FewerRising
201615351,000242619 · FewerStable
201529965,000342648 · TypicalFalling
201429779,000242639 · TypicalFalling
201336577,550342652 · TypicalFalling
201236481,320442658 · TypicalFalling
201138679,000442083 · MoreFalling
201029073,9253—2659 · TypicalFalling

All GMC Terrain model years · Best and worst years by complaints

Frequently asked questions

How many NHTSA complaints does the 2026 GMC Terrain have?

NHTSA recorded 33 consumer complaints for the 2026 GMC Terrain as of Oct 27, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.

What part of the 2026 GMC Terrain is reported most often?

Other or unknown is named most often, in 9 complaints (27% of the total), followed by forward collision avoidance with 6.

Has the 2026 GMC Terrain been recalled?

NHTSA lists 1 recall campaign for this model year. To check a specific vehicle, enter its VIN at nhtsa.gov/recalls.

What gas mileage does the 2026 GMC Terrain get?

The EPA rates the 2026 GMC Terrain (Terrain FWD, 1.5L 4-cyl) at 27 mpg combined, 26 city and 28 highway, with an estimated annual fuel cost of $2,500 at 15,000 miles a year. Other engine and drive versions are rated differently.

At what mileage are problems with the 2026 GMC Terrain reported?

Among the 7 complaints that include a mileage, the median is 3,000 miles and the middle half falls between 2,500 and 5,200 miles; 100% were filed for vehicles with under 50,000 miles.

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 27, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate. Crash ratings are from NHTSA’s New Car Assessment Program. Fuel economy is from the EPA and DOE (fueleconomy.gov).

Complaint counts come from NHTSA’s public complaint database; we count each complaint once. The source records for this vehicle are on nhtsa.gov. Scores and trends are our own summaries of that data, described in the methodology. This page is not legal, safety or repair advice: for a specific vehicle, check its VIN at nhtsa.gov/recalls and ask a qualified mechanic. See an error? Tell us.