What are the most common GMC Terrain problems?
According to Au7o's analysis of 3,010+ owner reports, the 2010-2025 GMC Terrain has 4 documented issues. The most frequently reported are: 2.4L I4 Excessive Oil Consumption and Piston Ring Failure, 1.5L Turbo PCV System Failure and Coolant/Oil Intrusion, Ecotec 2.4L Timing Chain and Tensioner Failure. Of these, 3 are rated critical and should be addressed promptly.
Is the GMC Terrain reliable?
The 2010-2025 GMC Terrain has 4 known issues documented across 3,010+ owner reports. 3 issues are rated critical: 2.4L I4 Excessive Oil Consumption and Piston Ring Failure and 1.5L Turbo PCV System Failure and Coolant/Oil Intrusion and Ecotec 2.4L Timing Chain and Tensioner Failure. Prospective buyers should inspect for these issues and factor potential repair costs into their purchase decision. Regular maintenance following the manufacturer's schedule helps prevent many common problems.
How much does it cost to fix common GMC Terrain problems?
Repair costs for known GMC Terrain issues range from $150 to $6,500, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, 2.4L I4 Excessive Oil Consumption and Piston Ring Failure, typically costs $1,200-$6,500 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.
What year GMC Terrain is the most reliable?
Reliability varies across model years of the GMC Terrain. Based on documented issues, problems are most commonly reported in earlier model years. Au7o recommends checking the specific known issues for your target year before purchasing, and having a pre-purchase inspection performed by a qualified mechanic. Our known issues database covers the 2010-2025 GMC Terrain with 4 documented issues documented across 3,010+ owner reports.
What is the 2010-2017 GMC Terrain 2.4L I4 Excessive Oil Consumption and Piston Ring Failure?
The 2.4L LEA and LE9 four-cylinder engines in 2010-2017 Terrain are among the most reported excessive oil consumption issues in GM's lineup. Many owners consume 1 quart of oil every 1,000-2,000 miles. The root cause is inadequate piston ring tension combined with piston ring land… Repairs typically run $1,200-$6,500. Severity: high.
What is the 2018-2025 GMC Terrain 1.5L Turbo PCV System Failure and Coolant/Oil Intrusion?
The 2018+ Terrain with the 1.5L turbocharged engine (LFV/LYX) experiences PCV (Positive Crankcase Ventilation) diaphragm failure inside the valve cover. The integrated PCV diaphragm tears, causing excessive crankcase pressure that forces oil into the intake manifold and intercool… Repairs typically run $400-$2,800. Severity: high.
What is the 2010-2014 GMC Terrain Ecotec 2.4L Timing Chain and Tensioner Failure?
The GM Ecotec 2.4L in the 2010-2014 Terrain has the same timing chain stretch and tensioner failure as the Equinox and Malibu. GM Special Coverage Adjustment SCA 12313C covers some vehicles. The 2010-2011 models are worst affected. Improperly hardened piston rings on 2010-2013 mo… Repairs typically run $1,000-$3,000. Severity: high.
What is the 2010-2017 GMC Terrain 6T40/6T45 6-Speed Transmission Shudder and Harsh Shifts?
The 2010-2017 Terrain uses the GM 6T40 (2.4L) and 6T45 (V6) 6-speed automatic transmissions, both of which suffer from torque converter shudder, harsh shifts, and solenoid failures. The shudder occurs at light throttle between 30-50 mph when the torque converter clutch locks up. Repairs typically run $150-$2,800. Severity: medium.
