GMC · Known Issues
2023 GMC Terrain Problems: 6 Known Issues
2023 model year · 740+ owner reports · Updated September 2026
2023 · All trims · All engines
Choose the year and equipment for your written issues and visual request.
2023 model year · 740+ owner reports · Updated September 2026
2023 · All trims · All engines
Choose the year and equipment for your written issues and visual request.
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According to Au7o's analysis of 740+ owner reports, the 2023 GMC Terrain has 6 documented known issues, with 3 rated critical. The most serious are 1.5L Turbo PCV System Failure and Coolant/Oil Intrusion ($400-$2,800 repair), High-Pressure Fuel Pump Failure Causing Engine Stall (Recall) ($0-$1,200 repair) and Occupant Classification System Fails to Suppress Front Passenger Airbag in Ventilated Seats (22V929) ($0-$0 repair). The most commonly reported issue is 1.5L Turbo PCV System Failure and Coolant/Oil Intrusion with 740 owner reports. Across all issues with published estimates, repair costs range from $150 to $2,800. DIY maintenance guides at au7o.io.
STRUCTURE:BODY:DOOR
General Motors, LLC (GM) is recalling certain 2024 Chevrolet Blazer, Blazer EV, Equinox, and GMC Terrain vehicles. The door strikers may fracture, resulting in the door opening unexpectedly.
CHILD SEAT:VEHICLE LATCH ANCHOR
General Motors, LLC (GM) is recalling certain 2020-2023 Chevrolet Equinox and GMC Terrain vehicles. The four rear-seat lower child seat LATCH anchorage bars may have excessive powder coating, which could prevent a child seat from being installed with the anchorage bars. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 225, "Child Restraint Anchorage Systems."
TIRES
General Motors, LLC (GM) is recalling certain 2021-2022 Chevrolet Equinox and GMC Terrain vehicles equipped with certain Hankook tires. The tires may have been manufactured with an insufficient amount of curative agent, which could cause tread separation.
SEATS
General Motors, LLC (GM) is recalling certain 2022-2023 Chevrolet Equinox and 2022 GMC Terrain vehicles. The driver's seat may have a stripped or loose bolt at the seat frame height-adjust pivot.
AIR BAGS:SENSOR:OCCUPANT CLASSIFICATION:FRONT PASSENGER
General Motors, LLC (GM) is recalling certain 2023 Chevrolet Equinox and GMC Terrain vehicles equipped with ventilated front passenger seats. The Occupant Classification System may not properly disable the front passenger air bag when there is a small child or child restraint detected in the seat.
Enter your VIN at NHTSA.gov to check recalls specific to your vehicle.
Don't see your problem? Describe your symptoms to get a diagnosis, or get a full repair guide.
According to Au7o's analysis of 740+ owner reports, the 2023 GMC Terrain has 6 documented issues. The most frequently reported are: 1.5L Turbo PCV System Failure and Coolant/Oil Intrusion, High-Pressure Fuel Pump Failure Causing Engine Stall (Recall), Occupant Classification System Fails to Suppress Front Passenger Airbag in Ventilated Seats (22V929). Of these, 3 are rated critical and should be addressed promptly.
The 2023 GMC Terrain has 6 known issues documented across 740+ owner reports. 3 issues are rated critical: 1.5L Turbo PCV System Failure and Coolant/Oil Intrusion and High-Pressure Fuel Pump Failure Causing Engine Stall (Recall) and Occupant Classification System Fails to Suppress Front Passenger Airbag in Ventilated Seats (22V929). 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.
Repair costs for known GMC Terrain issues range from $0 to $2,800, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, 1.5L Turbo PCV System Failure and Coolant/Oil Intrusion, typically costs $400-$2,800 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.
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.
On 1.5L turbo Terrains, a component inside the high-pressure fuel pump can fracture prematurely, generating metallic debris that migrates through the fuel line and blocks the injector inlets, starving the engine of fuel and causing sudden stalling and loss of power while driving… Repairs typically run $0-$1,200. Severity: high.
GM recalled 2023 Terrain vehicles built with ventilated front passenger seats because the Occupant Classification System may fail to properly disable the front passenger airbag when a small child or a child restraint is detected in that seat. If the airbag deploys against a child… Repairs typically run $0-$0. Severity: high.
Terrain front and rear hub assemblies integrate the ABS magnetic encoder ring into the bearing's inboard seal, where it sits directly exposed to road salt and moisture. Two distinct failure modes result. The mechanical one is the familiar humming or roaring that rises with speed… Repairs typically run $300-$800. Severity: medium.
On the second-generation Terrain (2018+) with the turbocharged 1.5L LYX or 2.0L LTG engine, the air-to-air charge air cooler (intercooler) accumulates condensate from humid or rainy driving plus PCV-borne moisture. In cold ambient temperatures that water freezes inside the CAC co… Repairs typically run $150-$900. Severity: medium.
GM recalled 2020-2023 Terrain vehicles because excessive powder coating on the four rear-seat lower child seat LATCH anchorage bars can prevent a child restraint from being properly installed or securely latched. A child seat that will not seat fully on the anchor may not restrai… Repairs typically run $0-$0. Severity: medium.
Content on this page was compiled with AI assistance using NHTSA complaints, TSBs, owner reports, and public automotive data. While we strive for accuracy, this information may contain errors. Always verify repair procedures and specifications with your vehicle's service manual or a qualified mechanic.