2014 GMC Sierra Transmission Problems

In this article, you will learn about the 2014 GMC Sierra transmission problems. We will discuss common issues that owners have experienced with the transmission in this specific model. By the end of the article, you will have a better understanding of what these problems are and what steps you can take to resolve them. So, let’s dive into the details and find out more about the transmission problems in the 2014 GMC Sierra.

2014 GMC Sierra Transmission Problems

Common Transmission Problems in GMC Sierra

Slipping Transmission

One of the most common transmission problems in the 2014 GMC Sierra is a slipping transmission. This occurs when the transmission fails to stay in the appropriate gear, causing the engine to rev without the vehicle gaining speed. You may notice a loss of power or a delay in acceleration when this happens. Slipping transmission can be caused by various factors such as low transmission fluid, worn out clutch plates, or a faulty solenoid.

Transmission Fluid Leaks

Another transmission issue that the 2014 GMC Sierra may experience is transmission fluid leaks. This can occur due to a cracked or damaged transmission pan, worn out seals, or loose bolts. Transmission fluid leaks can lead to low fluid levels, which can cause the transmission to overheat or even fail completely. It is important to fix any leaks promptly to prevent further damage to the transmission.

Transmission Overheating

Transmission overheating is a common problem in the 2014 GMC Sierra, especially when towing heavy loads or driving in extreme weather conditions. Overheating can cause the transmission fluid to break down, leading to accelerated wear and potential damage to internal components. If you notice your transmission temperature gauge reaching high levels or if you detect a burning smell, it is crucial to address the issue promptly to avoid further damage.

Symptoms of Transmission Problems

Jerking or Shifting Delays

If you experience jerking or delays when shifting gears in your 2014 GMC Sierra, it may indicate a transmission problem. Jerking can occur when the transmission fails to smoothly engage the next gear, resulting in a noticeable jolt or hesitation. This can be caused by a faulty transmission control module, worn-out clutch plates, or damaged solenoids.

Burning Smell

A burning smell coming from your vehicle could be a sign of transmission problems. Overheating transmission fluid can emit a distinct burning odor. This can be caused by a lack of proper cooling, low fluid levels, or a faulty transmission cooler. Ignoring this symptom can lead to severe damage to the transmission and other components.

Unusual Noises

If you hear unusual noises such as whining, grinding, or clunking coming from your transmission, it is important to have it inspected. These sounds can indicate worn-out bearings, damaged gears, or other internal issues. Ignoring these noises can lead to further damage and potentially expensive repairs.

Causes of Transmission Problems

Faulty Transmission Control Module

The transmission control module (TCM) is responsible for controlling the shift points and operation of the transmission in your GMC Sierra. If the TCM becomes faulty, it can cause various transmission problems such as shifting issues, slipping, or even complete transmission failure. A malfunctioning TCM may require reprogramming or replacement.

Defective Torque Converter

The torque converter is an integral part of the transmission that allows the engine to connect to the transmission and transfer power to the wheels. If the torque converter becomes defective, it can cause transmission issues such as slipping, overheating, or difficulty in shifting gears. In some cases, a faulty torque converter may require replacement.

Clogged Transmission Filter

The transmission filter is responsible for removing debris and contaminants from the transmission fluid. Over time, the filter can become clogged with dirt and debris, restricting the flow of fluid and causing transmission problems. A clogged filter can lead to shifting issues, slipping, or even complete transmission failure. Regular maintenance and filter replacements can prevent this issue.

2014 GMC Sierra Transmission Problems

How to Diagnose Transmission Problems

Check Engine Light

The check engine light on your 2014 GMC Sierra can be an indicator of various transmission problems. When the light illuminates, it is important to have the vehicle scanned for error codes to determine the cause of the issue. Error codes specific to the transmission can provide valuable information for diagnosis and repair.

Transmission Fluid Inspection

Checking the transmission fluid level and condition is an essential step in diagnosing transmission problems. Low fluid levels, burnt or discolored fluid, or a strong burnt odor can indicate transmission issues. If you are unsure how to check the transmission fluid, refer to your vehicle’s owner’s manual or consult a professional.

Diagnostic Tools

In some cases, diagnosing transmission problems may require the use of diagnostic tools. These tools can provide real-time data and error codes specific to the transmission system. Professional mechanics often use advanced diagnostic tools to accurately diagnose and repair transmission issues.

DIY Solutions for Transmission Problems

Transmission Fluid Flush

Performing a transmission fluid flush can help resolve some transmission problems. This process involves draining the old fluid and replacing it with new fluid, which can help remove contaminants and improve the overall performance of the transmission. It is essential to use the correct type of transmission fluid specified by the manufacturer.

Replacing Faulty Solenoids

Faulty solenoids can cause various transmission problems such as shifting issues or slipping. If you have identified a faulty solenoid through diagnostic testing, replacing it can often resolve the issue. Solenoids can be easily accessed and replaced in most GMC Sierra models with the proper tools and knowledge.

Performing Regular Maintenance

Regular maintenance is critical for preventing and addressing transmission problems. This includes checking and replacing transmission fluid, inspecting and replacing filters, and ensuring all components are in proper working order. Following the manufacturer’s recommended maintenance schedule can help identify and address potential transmission issues early on.

When to Seek Professional Help

Severe Transmission Damage

In cases of severe transmission damage, it is best to seek professional help. Severe damage can be caused by neglecting transmission problems or attempting DIY repairs without proper knowledge or tools. Professional mechanics have the expertise and equipment to diagnose and repair complex transmission issues.

Complex Transmission Repairs

Some transmission repairs require specialized knowledge and equipment that may not be available to the average DIYer. Complex repairs such as replacing internal components or rebuilding the transmission should be left to professionals. Attempting these repairs without the necessary expertise can lead to further damage or improper functioning of the transmission.

Manufacturer Warranty

If your 2014 GMC Sierra is still under manufacturer warranty, it is recommended to seek professional help for transmission problems. Repairs covered under the warranty may require specific documentation and authorized service centers. It is important to familiarize yourself with the terms and conditions of your warranty to ensure proper coverage.

Costs of Transmission Repairs

Labor Costs

Labor costs for transmission repairs can vary depending on the complexity of the job and the labor rates of the repair shop. Simple repairs such as solenoid replacement or fluid flush can cost a few hundred dollars, while more complex repairs such as transmission rebuilds or replacements can cost several thousand dollars.

Replacement Parts

The cost of replacement parts for transmission repairs can also vary depending on the specific component and the quality of the parts. OEM (Original Equipment Manufacturer) parts are generally more expensive than aftermarket parts. It is important to discuss the options with your mechanic and choose the best parts for your budget and needs.

Transmission Rebuild vs. Replacement

In some cases, a transmission rebuild may be a more cost-effective option than a complete replacement. A transmission rebuild involves disassembling the transmission, replacing worn-out or damaged components, and reassembling it. This can often be cheaper than purchasing a brand new transmission. However, the decision to rebuild or replace the transmission should be based on the extent of the damage and the recommendations of a professional mechanic.

Preventive Measures for Transmission Issues

Regular Transmission Fluid Changes

Regularly changing the transmission fluid and replacing the filter can help prevent many transmission problems. This helps maintain the integrity of the fluid and keeps the transmission running smoothly. Refer to your vehicle’s owner’s manual for the recommended interval for fluid changes and follow it accordingly.

Avoid Overloading or Overheating

Avoid overloading your 2014 GMC Sierra beyond its recommended towing capacity. Overloading can put excessive strain on the transmission, leading to overheating and potential damage. Additionally, avoid driving in extreme weather conditions for extended periods as it can also cause the transmission to overheat.

Proper Driving Techniques

Practicing proper driving techniques can help prolong the lifespan of your transmission. Avoid abrupt shifts, excessive idling, and aggressive driving, as these can put unnecessary stress on the transmission. Additionally, always come to a complete stop before shifting from drive to reverse or vice versa to prevent damage to the gears.

GMC Sierra Transmission Recall

Recall Overview

While the 2014 GMC Sierra did not have any major transmission recalls, it is important to stay updated on any recall information that may arise. Recalls are issued by the manufacturer to address safety or performance concerns in specific vehicle models. If you suspect that your GMC Sierra may be affected by a recall, it is advisable to contact GMC for more information.

Affected Models

Although the 2014 GMC Sierra did not have any significant transmission recalls, it is important to check if your specific model and trim level are affected by any recalls. GMC will have the most up-to-date information on any recalls that may apply to your vehicle.

Contacting GMC for Recall Information

To obtain accurate and specific recall information for your 2014 GMC Sierra, you can contact GMC directly. They have dedicated customer service representatives who can provide you with the necessary details and assist you with any recall-related concerns.


As a 2014 GMC Sierra owner, being aware of the common transmission problems that may arise can help you identify and address issues promptly. Whether it is a slipping transmission, fluid leaks, or overheating, it is important to diagnose and fix these problems before they escalate and lead to severe damage. Regular maintenance, proper driving techniques, and staying informed about any recalls can help prevent or minimize transmission issues in your GMC Sierra.

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