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GMC · Known Issues

2024 GMC Terrain Problems: 4 Known Issues

2024 model year · 740+ owner reports · Updated September 2026

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Issue summary

According to Au7o's analysis of 740+ owner reports, the 2024 GMC Terrain has 4 documented known issues, with 2 rated critical. The most serious are 1.5L Turbo PCV System Failure and Coolant/Oil Intrusion ($400-$2,800 repair) and Door Striker Fracture Allowing a Door to Open While Driving (Recall 23V869000). 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.

In This Article

  • Terrain Engine2
  • Terrain Body/Panels1
  • Terrain Brakes1
  • Recalls5
  • FAQ
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In This Article

  • Engine2
  • Body/Panels1
  • Brakes1
  • Recalls5

All 4 Known Issues

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ALL YEARS2025202420232022202120202019201820172016201520142013201220112010
Community reported
740 owners

On the 2018-2025 GMC Terrain, 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 intercooler. Symptoms include oily residue around the air intake and intercooler outlet pipe. In severe cases, excessive crankcase pressure also causes coolant intrusion into the combustion chamber. GM issued TSB PIT5697 for this issue. This is the same problem affecting the Chevrolet Equinox 1.5T of the same era.

This issue also affects: Buick Cascada, Buick Encore GX, Buick Encore

Common Symptoms

  • Oil residue in intercooler outlet pipe or air intake
  • Blue/white smoke from exhaust
  • Coolant level dropping with no visible external leak
  • Rough idle after cold start
  • Check engine light (boost, MAF, or misfire codes)
  • Oil smell from engine bay

How to Fix

Replace valve cover assembly with updated GM part (GM 12690058) which includes the revised PCV diaphragm. Clean intercooler and intake manifold of oil contamination. Check for coolant consumption alongside oil intrusion. Inspect air-to-water intercooler for coolant contamination — replacement if contaminated (GM 84446987).

Typical repair cost:$400 - $2,800

Research This Issue

Based on 740 owner reports

GoogleRedditYouTubeNHTSA
Community Reported
High Confidence740 owner reportsLast reported by owners Feb 2026Reviewed Feb 2026

On the 2018-2024 GMC Terrain, 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 core, restricting charge airflow. GM documents this in service bulletin 18-NA-020, originally issued for 2018-2022 and later expanded through the 2024 model year. Owners on the Terrain/Equinox forum describe ice and standing water inside the charge tube. This is a distinct failure from the CAC outlet duct popping off the throttle body and from the 1.5L PCV coolant/oil intrusion problem - here the cooler itself is obstructed by ice or contamination, not disconnected.

This issue also affects: Buick LeSabre, Buick Park Avenue, Buick Cascada

Common Symptoms

  • Check engine light in cold weather
  • Reduced engine power message
  • Rough running and misfire
  • Loss of boost / sluggish acceleration
  • Water or ice found inside the charge pipe

How to Fix

Follow 18-NA-020: leak-test the CAC, thaw and clean a non-leaking contaminated cooler, and install only the bulletin-specified thermostatic shutter for the confirmed RPO and cold-weather branch. A universal intercooler or grille insert is not the prescribed repair.

Typical repair cost:$150 - $900

Research This Issue

GoogleRedditYouTubeNHTSA
Community Reported
High ConfidenceVerifiedReviewed Aug 2026

On the 2024 GMC Terrain, gM recalled a small group of 2024 GMC Terrain SUVs because the door strikers — the metal loops on the body pillars that the door latch grabs onto — can fracture. If a striker breaks, the latch has nothing to hold, and the door can open unexpectedly. NHTSA lists the defect under Structure: Body: Door, and GM's internal campaign number is N232429911. The recall population is very small: 265 vehicles campaign-wide, counting every model covered (2024 Chevrolet Blazer, Blazer EV, Equinox, and GMC Terrain together), not 265 Terrains. Because a fractured striker can let a door swing open with the Terrain in motion, NHTSA describes the consequence as an increased risk of injury or a crash. Owner notification letters for the campaign were mailed January 24, 2024.

Common Symptoms

  • A door opening unexpectedly while the vehicle is being driven
  • A door that does not latch or hold securely

How to Fix

The repair is free at any GMC dealer. Dealers replace all four door strikers and their attaching bolts — the fix is not limited to whichever door might feel wrong, so ask for the complete four-door replacement under recall N232429911. Since only 265 vehicles across all four models are involved, the fastest way to know whether your Terrain is one of them is to enter your 17-digit VIN at nhtsa.gov/recalls; if the campaign shows up, call GMC customer service at 1-800-462-8782 or book directly with a dealer. If a door is not latching securely, avoid carrying passengers in that seat until the strikers are replaced.

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Research This Issue

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Community Reported
High ConfidenceVerifiedReviewed Aug 2026

On the 2010-2024 GMC Terrain, 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 and changes when loading the bearing in a wide turn. The one that fools owners and shops is encoder-ring failure on a bearing that is still mechanically tight and silent: the wheel speed signal drops out and the vehicle sets a wheel speed sensor code with ABS, traction control and stability control disabled. Replacing only the external sensor does not fix it, because the encoder is part of the bearing. Both generations are affected, with salt-belt vehicles failing earliest.

This issue also affects: Chevrolet Avalanche, GMC Sierra 1500, GMC Yukon XL

Common Symptoms

  • Humming or roaring that increases with speed
  • Noise changes when swerving left or right
  • ABS, traction control and stability control warning lights
  • Speedometer dropout or erratic reading
  • No noise or play but a wheel speed sensor code present

How to Fix

Compare all four live wheel-speed signals and inspect the harness before choosing a hub. Front/rear, driven/non-driven and 2010-2017 versus 2018-2024 assemblies differ, so the broad issue cannot safely point to one hub.

Typical repair cost:$300 - $800

Research This Issue

GoogleRedditYouTubeNHTSA
Community Reported
Low ConfidenceVerifiedReviewed Aug 2026
NHTSA Recalls5 recalls

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."

Campaign #23V33900011/05/2023

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.

Campaign #21V61200005/08/2021

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.

Campaign #22V72400029/09/2022
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Other GMC Models

GMC Sierra 150035GMC Yukon XL24GMC Sierra 3500HD24GMC Acadia22GMC Yukon21GMC Canyon18

Frequently Asked Questions

What are the most common GMC Terrain problems?

According to Au7o's analysis of 740+ owner reports, the 2024 GMC Terrain has 4 documented issues. The most frequently reported are: 1.5L Turbo PCV System Failure and Coolant/Oil Intrusion, Door Striker Fracture Allowing a Door to Open While Driving (Recall 23V869000), Wheel Bearing / Hub Assembly Magnetic Encoder Ring Failure - ABS and Traction Lights Without Bearing Noise. Of these, 2 are rated critical and should be addressed promptly.

Is the GMC Terrain reliable?

The 2024 GMC Terrain has 4 known issues documented across 740+ owner reports. 2 issues are rated critical: 1.5L Turbo PCV System Failure and Coolant/Oil Intrusion and Door Striker Fracture Allowing a Door to Open While Driving (Recall 23V869000). 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 $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.

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 2024 GMC Terrain Door Striker Fracture Allowing a Door to Open While Driving (Recall 23V869000)?

GM recalled a small group of 2024 GMC Terrain SUVs because the door strikers — the metal loops on the body pillars that the door latch grabs onto — can fracture. If a striker breaks, the latch has nothing to hold, and the door can open unexpectedly. NHTSA lists the defect under S… Severity: high.

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.

Data sourced from 740+ owner reports, NHTSA recalls, TSBs, and automotive forums.

FAQ

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.

Campaign #22V92900015/12/2022

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.

Campaign #23V86900021/12/2023

Enter your VIN at NHTSA.gov to check recalls specific to your vehicle.

What is the 2010-2024 GMC Terrain Wheel Bearing / Hub Assembly Magnetic Encoder Ring Failure - ABS and Traction Lights Without Bearing Noise?

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.

What is the 2018-2024 GMC Terrain Charge Air Cooler Moisture Freeze-Up - Misfire, Underboost and Reduced Engine Power in Cold Weather?

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.