2014 GMC Yukon Has Rough Idle

Common Causes of Rough Idling in Your 2014 GMC Yukon and How to Resolve Them

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Reviewed by
Aisha
Written by RepairPal Car Genius
Updated January 14, 2025
0%
21% chance it's the
Spark Plugs
0%
15% chance it's the
Ignition Coil
0%
64% chance it's
Something else
The most common reasons a 2014 GMC Yukon has rough idle are a vacuum leak, an issue with the spark plugs, or a problem with the ignition coil.
  • Spark Plugs: Worn or fouled spark plugs can lead to misfires, poor fuel economy, and difficulty starting the engine.
  • Ignition Coil: A faulty ignition coil can cause misfires, rough idling, and difficulty starting the engine due to inadequate spark delivery to the spark plugs.
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 2014 GMC Yukon has rough idle?

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.

Here are a few common symptoms of worn-out brake pads:

  1. Low brake pad warning light is on: Not all vehicles are equipped with this system, but if yours is, this dashboard indicator light will likely be the first signal it’s time to replace your brake pads.
  2. Brakes start to squeal regularly: This is often one of the first signs of worn brake pads and is caused by a metallic piece built into brake pads for this exact purpose. This part contacts the brake rotor to make a squealing or whining noise when the pads are low.
  3. Brakes make loud grinding noise: If not addressed early enough, your brake pads may get so worn that the metal backing plate of the pad grinds against the metal rotor.
  4. Brake pads look thin: You may be able to visually check your brake pad thickness to determine if they need replacement.

Most often, a brake system inspection will just be a routine portion of manufacturer specified maintenance, and will be performed at mileage intervals. In those cases, there will likely be no symptoms. However, when a brake system makes a funny noise, causes vibration, is hard to use, will not slow the vehicle, prevents the vehicle from driving, makes the vehicle pull to one side, or leaks brake fluid, the vehicle will need a visit dedicated to the inspection of the brake system.

What are the initial diagnostic steps to take for a rough idle in a 2014 GMC Yukon?

When addressing a rough idle in your 2014 GMC Yukon, it's essential to adopt a systematic diagnostic approach that begins with the simplest checks before progressing to more complex issues. Start by using an OBD-II scanner to check for any fault codes, as these can quickly point you to specific problems within the engine. Next, inspect the spark plugs for wear or fouling, as these components are crucial for proper ignition and can significantly affect engine performance. Following this, examine the air filter; a clean filter is vital for optimal airflow, and replacing a clogged one can often resolve idle issues. Additionally, inspect the vacuum hoses for any signs of damage or disconnection, as leaks can disrupt the air-fuel mixture. Don’t overlook the fuel system; ensure that the fuel filter and injectors are clean and functioning correctly, as blockages here can lead to rough idling. Finally, take a look at the throttle body, as carbon buildup can hinder its operation. By methodically working through these steps, you can effectively diagnose and address the rough idle in your vehicle.

What are the common causes of a rough idle in a 2014 GMC Yukon?

When dealing with a rough idle in a 2014 GMC Yukon, it's essential to understand the common problems that could be at play. One of the primary culprits is a dirty or clogged air filter, which can significantly restrict airflow to the engine, leading to performance issues. Additionally, faulty spark plugs are notorious for causing misfires, which can manifest as a rough idle. Another potential issue is vacuum leaks; these can disrupt the delicate balance of the air-fuel mixture, resulting in an unstable idle. Fuel system problems, such as a clogged fuel filter or a malfunctioning fuel pump, can also impact engine performance and contribute to rough idling. Furthermore, a malfunctioning Mass Airflow Sensor (MAF) can throw off the air-fuel mixture, exacerbating the problem. Lastly, issues with the Idle Air Control Valve (IAC) can disrupt the engine's idle speed control, leading to further instability. By being aware of these common causes, DIY enthusiasts can take proactive steps to diagnose and address the rough idle in their GMC Yukon, ensuring smoother operation and improved performance.

How urgent is it to address the rough idle in a 2014 GMC Yukon?

Addressing a rough idle in your 2014 GMC Yukon is not just a matter of comfort; it is crucial for the vehicle's overall health and performance. Ignoring this symptom can lead to a cascade of problems, including decreased fuel efficiency and engine misfires, which may escalate into more severe engine damage over time. The rough idle could be indicative of underlying issues within the engine or fuel system that, if left unresolved, could result in costly repairs. Moreover, a rough idle can compromise your vehicle's safety, as it may affect the engine's reliability and responsiveness. Therefore, it is essential to prioritize this issue and conduct a thorough inspection to identify and rectify the root cause promptly. By doing so, you not only enhance your driving experience but also extend the lifespan of your GMC Yukon, ensuring it remains a dependable vehicle for years to come.

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