The 2016 GMC Sierra is known for its robust build, advanced technology, and ease of use. Among its many features, the power folding mirrors stand out as a major convenience, allowing drivers to fold their mirrors in and out with the push of a button, making parking and navigating tight spaces much easier. However, there may be times when these mirrors malfunction, leading to frustration for the driver. This article will cover common causes of issues related to the power folding mirrors, troubleshooting tips, and potential solutions to get those mirrors working again.
Understanding the Functionality of Power Folding Mirrors
Before delving into troubleshooting techniques, it’s essential to understand how power folding mirrors are designed to function in the GMC Sierra.
Power folding mirrors generally include features that may consist of:
- **Automatic folding and unfolding:** Controlled by a switch from the driver’s console.
- **Power adjustments:** Allowing the mirrors to be adjusted up, down, left, or right for optimal visibility.
When everything works well, these features enhance convenience and safety.
Common Causes of Failure in Power Folding Mirrors
When the power folding mirrors fail to operate, several factors could be at play. Identifying the root cause is important to effective troubleshooting:
Electrical Issues
Electrical problems are one of the predominant causes for power mirror failures. Several components in the electrical system could contribute to this issue:
- **Blown fuses:** If a fuse controlling the mirrors is blown, the mirrors may not function.
- **Wiring issues:** Damaged or frayed wiring can disrupt the connectivity needed for the operation of the mirrors.
- **Faulty switch:** If the control switch is not functioning correctly, it may fail to send the signal to the mirrors to fold in or out.
Mechanical Problems
Aside from electrical issues, mechanical problems can also arise, impacting the power folding mechanisms:
- Jammed mechanisms: Dirt and debris can accumulate in the folding mechanism, preventing smooth operation.
- Wear and tear: Over time, the hinge mechanisms may wear down, affecting functionality.
Software Malfunctions
Modern vehicles, including the 2016 GMC Sierra, are increasingly reliant on software for various functions. Sometimes software glitches may interfere with mirror operation, especially after updates or changes to vehicle settings.
Troubleshooting Your 2016 GMC Sierra Power Folding Mirrors
If you find that your power folding mirrors aren’t working, follow these troubleshooting steps to help pinpoint the issue:
Step 1: Check the Fuses
Begin your troubleshooting journey by checking the fuses related to the power folding mirrors.
Tools necessary:
- Fuse puller (or tweezers)
- User manual (to locate the appropriate fuse)
Process:
- Open the fuse box, which is usually located under the dashboard on the driver’s side or in the engine compartment.
- Find the fuse designated for the power folding mirrors (consult the user manual for exact location).
- Remove the fuse and visually inspect it. If the metal strip inside is broken, replace it with a new fuse of the same amperage rating.
Step 2: Inspect the Wiring
Should the fuses check out, inspect the wiring that connects to the mirrors.
Look for:
- Frayed wires
- Loose connections
- Signs of corrosion
If any issues are detected, it may be necessary to repair or replace the damaged wiring.
Step 3: Test the Control Switch
If fuses and wiring appear in good condition, the next step is to test the control switch.
Process:
- Remove the control switch from the driver’s console.
- Use a multimeter to test for continuity while pressing the mirror folding button.
- If there is no continuity, the switch may need to be replaced.
Step 4: Examine the Mechanism for Jammed Parts
If wiring and switches seem to be functioning, inspect the mechanical components of the mirrors:
- Check for dirt or debris around the hinges of the mirrors.
- Manually try to fold the mirrors in and out if possible. If they feel jammed, clean any debris.
Potential Solutions for Faulty Power Folding Mirrors
After identifying the cause of the issue, consider the following solutions:
Replacing the Blown Fuse
If a fuse is blown, replacing it is an easy fix. Be sure to check your vehicle’s manual for the correct fuse rating to avoid further issues.
Repairing or Replacing Wires
If faulty wiring is detected, repair the damages where possible. If the damage is severe, consider replacing the complete wire harness, which may involve professional help.
Switch Replacement
If the control switch is faulty, obtaining a new switch from a reliable auto parts retailer and installing it can resolve your issue.
Seeking Professional Assistance
For mechanical issues beyond simple cleaning, or if you are uncomfortable proceeding with electrical repairs, it is advisable to seek the help of a professional mechanic or visit a GMC dealership. They have the necessary tools and expertise to resolve more complex problems reliably.
Prevention of Future Issues
Maintaining your GMC Sierra can help prevent future problems with your power folding mirrors. Here are some helpful tips to keep them functioning well:
Regular Cleaning
Dust and debris can cause jamming in the folding mechanism over time. Regularly clean the mirrors and the surrounding area to ensure smooth operation.
Periodic Checks of Electrical Connections
Regularly inspect the fuses and wiring to identify signs of wear early. This can help prevent future functionality issues.
Software Updates
Occasionally, software upgrades from the manufacturer can improve the operability of various vehicle systems, including mirror controls. Ensure your vehicle is updated as necessary.
Conclusion
When your 2016 GMC Sierra’s power folding mirrors stop working, it can be a frustrating experience. Thankfully, by understanding the potential causes of the issue and how to troubleshoot, you can tackle the problem effectively. Hopefully, this guide serves as a handy reference for diagnosing problems and finding solutions.
Don’t let malfunctioning mirrors hinder your driving experience; take action and get back to the comfort and convenience that your GMC Sierra is designed to offer! Remember, for complex issues, don’t hesitate to seek professional assistance. Vehicle maintenance not only enables you to enjoy your driving experience but also helps prolong the lifespan of your vehicle’s components.
What causes power folding mirrors to stop working on a 2016 GMC Sierra?
The power folding mirrors on a 2016 GMC Sierra can stop functioning due to several reasons. One common cause is a blown fuse, which may occur if the mirrors have been overloaded or if there’s a short circuit in the wiring. The mirrors are powered by electrical components, and if any part of the system fails, it can prevent the mirrors from folding in or out as intended.
Another potential cause could be an issue with the switch or control module that operates the mirrors. If the switch is faulty or has a poor connection, it may fail to send the necessary signals to the motors that control the folding mechanism. Additionally, physical damage to the mirrors themselves or corrosion in the wiring can also impede their functionality.
How can I troubleshoot non-functioning power folding mirrors?
To troubleshoot the non-functioning power folding mirrors, you can start by checking the fuse related to the mirror controls. Consult the owner’s manual to locate the specific fuse and verify if it is blown. If the fuse is intact, use a multimeter to check for continuity. If there’s an issue with the fuse, replacing it is often a simple and effective solution.
Next, inspect the wiring and connections for signs of wear, corrosion, or loose connections. Ensure that the mirror switch is functioning correctly by testing it with a multimeter or swapping it with a known working switch if available. If you detect no issues with the fuse or the switch, further electrical testing may be required to identify faults within the control module or the motors themselves.
Can I fix power folding mirrors myself, or should I consult a professional?
Whether you can fix the power folding mirrors yourself largely depends on your level of automotive repair experience and the specific problem at hand. If the issue is something straightforward like a blown fuse or a loose connection, you might be able to resolve it without professional help. Basic electrical testing can guide you through identifying and fixing these issues without requiring specialized tools.
However, if your troubleshooting leads you to believe that the problem lies within the control module or the mirror motors themselves, it may be wiser to consult a professional mechanic. Hiring a professional ensures that the diagnosis is accurate, especially if the repair requires more specialized knowledge or equipment not available to the average car owner.
What tools do I need to troubleshoot power folding mirrors?
To effectively troubleshoot power folding mirrors on your GMC Sierra, a few essential tools are necessary. Firstly, you’ll need a multimeter to test the electrical components, such as fuses, switches, and wiring continuity. This tool will help you identify issues such as blown fuses or faulty connections.
In addition to a multimeter, having basic hand tools — like screwdrivers and pliers — will facilitate the removal and inspection of the mirror assemblies and electrical connectors. A fuse puller can also be helpful when checking the fuses. If you plan to delve deeper into repairs, consider having a repair manual for your vehicle on hand, as it can provide valuable diagrams and information related to the wiring of the power mirrors.
What should I do if I find a faulty switch?
If you discover that the switch controlling the power folding mirrors is faulty, the most straightforward resolution is to replace it. Depending on your comfort level with auto repairs, you can either attempt to replace the switch yourself or take the vehicle to a professional. For DIY replacements, ensure you procure the correct switch model compatible with your 2016 GMC Sierra and follow appropriate instructions for removal and installation.
When replacing the switch, it’s important to disconnect the vehicle’s battery to prevent electrical shorts. After the new switch is installed, reconnect the battery and test the mirrors to confirm that they are functioning correctly. If the mirrors still do not work after replacing the switch, further investigation into the electrical system may be necessary.
Could issues with other electrical components affect power folding mirrors?
Yes, issues with other electrical components can indeed affect the functionality of the power folding mirrors. The mirrors are connected to the vehicle’s main electrical system, meaning problems like a dead battery, a malfunctioning alternator, or issues in the wiring harness can lead to mirror failure. If there are electrical disruptions or power supply issues within the vehicle, the mirrors may not receive the necessary signals to operate.
Furthermore, if your vehicle has advanced features that integrate with the mirror system, such as memory settings or heating functions, faults in these components can also impact the power folding feature. It’s crucial to perform a thorough inspection of the overall electrical system to isolate the exact cause of the issue, especially if the problem persists after checking the mirrors and their direct components.