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10 complaints
↗GMC TERRAIN 2026 SERVICE BRAKES
lowABV came on. SCR alerted I needed service. On a 25 mph road I no longer could brake randomly
↗GMC TERRAIN 2026 POWER TRAIN
mediumThe contact owns a 2026 GMC Terrain. While driving at 28 MPH, the RPM became elevated to over 3,000 RPM. There was no warning light illuminated. The contact immediately pulled over and then resumed no…
↗GMC TERRAIN 2026 SUSPENSION
mediumThe contact owns a 2026 GMC Terrain. The contact stated that there was an abnormal clunking sound coming from the front driverâs side suspension while driving over bumps in the roadway, and while br…
↗GMC TERRAIN 2026 UNKNOWN OR OTHER
lowPurchased NEW 2026 GMC Terrain Elevation, and it came with NO User Manual. I was told by the dealership (Al Serra GMC in Grand Blanc Michigan that i could either purchase one for $50.00+ dollars, PLUS…
↗GMC TERRAIN 2026 FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING
mediumThe system that failed was the brakes, The car is availble for inspection. My saftey and others was put at risk due to not having brakes to stop. The problem has been confirmed by a dealer as a ma…
↗GMC TERRAIN 2026 POWER TRAIN
lowThe car has always had an issue where it would just get stuck in a low gear and RPMs would go high. Does this every single day. But recently it also started acting like it was put into neutral for a f…
↗GMC TERRAIN 2026 ELECTRICAL SYSTEM
lowThe 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 of…
↗GMC TERRAIN 2026 UNKNOWN OR OTHER
lowI have brand new GMC Terrain 2026, I leased dog on Aug 4th 2025. After one week into driving the vehicle, OnStar, GPS NAV stopped working and the Emergency calling is not working. All features related…
↗GMC TERRAIN 2026 SERVICE BRAKES
lowMaster cylinder , less then 1000 miles was pulling out of a parking lot and the brakes went out
↗GMC TERRAIN 2026 UNKNOWN OR OTHER
mediumVery soon after purchase vehicle developed a front end shake and continued to get worse. This happens when pulling out or in stop and go traffic this varies from in intensity and sometimes it can be q…