2023 GMC Terrain Engine Is Stalling

Common Causes of Engine Stalling in Your 2023 GMC Terrain and How to Resolve Them

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Reviewed by
Bo Fader
Written by RepairPal Car Genius
Updated January 14, 2025
0%
30% chance it's the
Fuel System
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15% chance it's the
Air Intake System
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55% chance it's
Something else
The most common reasons a 2023 GMC Terrain engine is stalling are the fuel system, the air intake system, or the ignition system.
  • Fuel System: A clogged fuel filter or failing fuel pump can restrict fuel flow, resulting in poor engine performance and starting issues.
  • Air Intake System: A dirty or damaged air filter or a malfunctioning mass airflow sensor can restrict airflow, leading to reduced engine performance and efficiency.
Proper diagnosis will determine the exact cause of your symptom, saving you money on unnecessary repairs. The diagnostic experts at RepairPal Certified shops have the right tools and experience to solve any symptom.

How much does it cost to fix a 2023 GMC Terrain engine is stalling?

Common Repairs

The total repair cost will vary based on the condition of your vehicle and the number of repairs needed to fix your symptom. Proper diagnosis will save you money by finding the exact repairs needed to fix your car right the first time.

If the MAF sensor sends an erroneous signal, a few things happen. The engine's computer will trigger the check engine light, and the on-board diagnostic (OBD) trouble codes will reflect the airflow discrepancy noted by the MAF sensor. Depending on the reported volume of air, the engine may try to compensate for these conditions, causing the engine to burn excessive amounts of fuel and emit black smoke from the exhaust. In this case, the OBD trouble codes would also reference faults recognized by the exhaust oxygen sensors. The engine may also have issues with idling roughly, failing to start, stalling, hesitation, power loss, misfires, and fuel consumption.

»MORE: Signs of a failing mass airflow sensor

A faulty oxygen sensor is one of the most common causes of a check engine light. Symptoms may include a decrease in fuel mileage, hesitation or misfiring from the engine, rough idling or even stalling. A faulty sensor may cause the vehicle to fail an emissions test.

Any time there is an emissions fault the check engine light will be displayed. The purpose of the check engine light is to inform the driver that an emission related fault has been found, and that there are on-board diagnostic (OBD) trouble codes stored in the powertrain or engine control module. Additionally, since the emissions systems are so intertwined into engine control and transmission control systems, symptoms may include nearly any sort of drivability concerns. This may include harsh shifting, failure to shift, hesitation on acceleration, jerking, engine failure to start or run, loss of power, or any number of other drivability issues.

The most likely symptom of a faulty fuel temperature sensor is a check engine light. When the sensor goes bad, the Engine Control Module signals the driver that there is a problem by turning on the dash light. Poor fuel economy might also be noticed. In some cases, a failing fuel temperature sensor could lead to hard starting of the engine or an engine misfire and poor performance.

When the Check Engine Light comes on, you may experience engine performance issues such as poor acceleration, rough idling, or an engine that won't start. In some cases, no abnormal symptoms will be experienced. Other systems like the transmission or ABS can cause the Check Engine Light to illuminate and lights for those systems can come on at the same time. Similar lights may say "Check Engine Soon", "Malfunction Indicator Light" or just "Check". In rare case the engine can overheat.

What are the initial diagnostic steps to take for a 2023 GMC Terrain experiencing engine stalling?

When faced with engine stalling in a 2023 GMC Terrain, it's essential to adopt a methodical diagnostic approach to effectively identify the root cause. Start by checking for error codes using an OBD-II scanner, as these codes can reveal specific issues within the vehicle's systems. Next, inspect the fuel system, focusing on the fuel pump, filter, and injectors to ensure they are delivering adequate fuel to the engine. Following this, examine the ignition system components, including spark plugs and ignition coils, to confirm they are providing the necessary spark for combustion. Additionally, evaluate the air intake system for any blockages or leaks that could hinder airflow. Don't overlook the importance of sensors; inspect critical ones like the mass airflow and throttle position sensors, as they significantly impact engine performance. Lastly, check the battery and charging system to rule out electrical issues that could contribute to stalling. By systematically addressing these areas, you can effectively diagnose and potentially resolve the stalling issue in your GMC Terrain.

What are the common problems that could cause the engine to stall in a 2023 GMC Terrain?

When your 2023 GMC Terrain experiences engine stalling, it’s essential to understand the potential culprits to effectively diagnose and fix the problem. One of the most frequent issues is related to the fuel system; a clogged fuel filter or a malfunctioning fuel pump can disrupt the flow of fuel, leading to stalling. Additionally, the ignition system plays a critical role; failing components like ignition coils or worn spark plugs can prevent the engine from firing properly. Airflow blockages, often caused by a dirty air filter or a faulty mass airflow sensor, can also hinder engine performance, resulting in stalling. Electrical problems, such as a weak battery or a faulty alternator, can further complicate matters, as they affect the overall power supply to the engine. Lastly, malfunctioning sensors, including the crankshaft and camshaft position sensors, can send incorrect data to the engine control unit, causing it to stall unexpectedly. By systematically checking these areas, you can identify and resolve the underlying issues, ensuring your GMC Terrain runs smoothly and reliably.

How urgent is it to address the engine stalling issue in a 2023 GMC Terrain?

Addressing the engine stalling issue in a 2023 GMC Terrain is of utmost urgency due to the significant safety risks it poses. An unexpected stall can lead to a loss of control, especially in high-traffic situations, increasing the likelihood of accidents. Moreover, neglecting this problem can lead to more severe mechanical failures, resulting in costly repairs and inconvenient breakdowns. Regular maintenance is essential not only for the vehicle's longevity but also for ensuring that any emerging issues are caught early. It is advisable to consult a qualified mechanic or your dealership promptly to diagnose and resolve the stalling issue, thereby safeguarding your vehicle's performance and your safety on the road. Taking swift action can prevent further complications and ensure a smoother, safer driving experience.

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