GMC Terrain Problems: 4 Issues Every Owner Should Know
2010-2025 model years ยท 3,010+ owner reports ยท Updated April 2026
According to Au7o's analysis of 3,010+ owner reports, the 2010-2025 GMC Terrain has 4 documented known issues, with 3 rated critical. The most serious are 2.4L I4 Excessive Oil Consumption and Piston Ring Failure ($1,200-$6,500 repair), 1.5L Turbo PCV System Failure and Coolant/Oil Intrusion ($400-$2,800 repair) and Ecotec 2.4L Timing Chain and Tensioner Failure ($1,000-$3,000 repair). The most commonly reported issue is 2.4L I4 Excessive Oil Consumption and Piston Ring Failure with 1,680 owner reports. Across all issues, repair costs range from $150 to $6,500. DIY maintenance guides at au7o.io.