2025-2026 GMC Terrain vibration issue: GM investigates shaking during acceleration
GM investigates vibration issue in 2025-2026 GMC Terrain crossover
2025-2026 GMC Terrain vibration issue: GM investigates shaking during acceleration
General Motors reports potential wandering, shaking, or swaying in the 2025-2026 GMC Terrain during moderate acceleration. Learn about the service bulletin and ongoing investigation.
2026-03-02T02:02:18+03:00
2026-03-02T02:02:18+03:00
2026-03-02T02:02:18+03:00
General Motors has alerted dealers to a potential issue with the 2025-2026 GMC Terrain crossover. In service bulletin PIT6466, published in December 2025, the company details reports of "wandering, shaking, or swaying" during moderate acceleration.According to the document, vibrations may be felt in the seat, floor, or steering wheel during normal driving. In some cases, the effect occurs when shifting into the lower second gear. This bulletin applies to vehicles sold in the U.S., Canada, Mexico, Middle Eastern countries, and Brazil.GM's engineering team is currently investigating the root cause. For now, no specific fix or repair procedure has been established. Dealers are advised to log customer complaints and inform owners that the situation is under review. The automaker emphasizes that no signs of long-term damage or reliability threats have been identified, and continued operation of the vehicle is permitted.The third-generation GMC Terrain is built on the GM D2 platform and features a 1.5-liter turbocharged gasoline I4 LSD engine with front-wheel or all-wheel drive. Production is based at GM's San Luis Potosí plant in Mexico. Such service notifications are not uncommon for new model generations.Overall, the picture is straightforward: GM is promptly addressing reports and conducting an investigation. If the cause turns out to be software-related or tied to transmission calibration, a resolution could come relatively quickly.
GMC Terrain, vibration issue, GM service bulletin, 2025-2026 Terrain, shaking during acceleration, automotive recall, crossover problems
2026
Michael Powers
news
GM investigates vibration issue in 2025-2026 GMC Terrain crossover
General Motors reports potential wandering, shaking, or swaying in the 2025-2026 GMC Terrain during moderate acceleration. Learn about the service bulletin and ongoing investigation.
Michael Powers, Editor
General Motors has alerted dealers to a potential issue with the 2025-2026 GMC Terrain crossover. In service bulletin PIT6466, published in December 2025, the company details reports of "wandering, shaking, or swaying" during moderate acceleration.
According to the document, vibrations may be felt in the seat, floor, or steering wheel during normal driving. In some cases, the effect occurs when shifting into the lower second gear. This bulletin applies to vehicles sold in the U.S., Canada, Mexico, Middle Eastern countries, and Brazil.
GM's engineering team is currently investigating the root cause. For now, no specific fix or repair procedure has been established. Dealers are advised to log customer complaints and inform owners that the situation is under review. The automaker emphasizes that no signs of long-term damage or reliability threats have been identified, and continued operation of the vehicle is permitted.
The third-generation GMC Terrain is built on the GM D2 platform and features a 1.5-liter turbocharged gasoline I4 LSD engine with front-wheel or all-wheel drive. Production is based at GM's San Luis Potosí plant in Mexico. Such service notifications are not uncommon for new model generations.
Overall, the picture is straightforward: GM is promptly addressing reports and conducting an investigation. If the cause turns out to be software-related or tied to transmission calibration, a resolution could come relatively quickly.
