GMC Sierra is a pickup truck that was introduced in 1962 by General Motors Company. As all GMC Sierra owners know If the headlights on your 2015 GMC Sierra are not working, it can be a frustrating and potentially dangerous issue. In this article, I will discuss top GMC Sierra headlight problems based on my experience and knowledge.
Common 2015 GMC Sierra Headlights Problems
1) Bad Relay Problem
A 2015 GMC Sierra Headlights Not Working due to a Bad Relay is a pretty common issue. The headlight relay is an electrical component in your GMC Sierra that controls the headlight circuit. When it goes bad, the headlights may not be able to turn on or off. A bad headlight relay can be caused by several things. These things include a faulty connection, bad ground, or even a corroded or damaged relay.
Solution to Fix Bad Relay Problems
To get rid of the bad relay, you can try to replace the relay. Replacing the relay is a relatively simple process. It can be done by most people with basic automotive knowledge. You will need to locate the headlight relay on your GMC Sierra’s fuse box. Then disconnect the electrical connection to it. Next, you will need to remove the old relay and replace it with a new one. Once the new relay is in place, you should be able to turn your headlights on and off without any problems.
2) Blown Bulb Problem
Another cause of the 2015 GMC Sierra Headlights not working issue is the blown bulb problem. A blown bulb problem can occur due to a faulty headlight bulb or a blown fuse in the headlight system. The headlight bulbs mostly get faulty due to age, strong energy surges, extreme temperatures, and vibrations.
A Solution to Fix Blown Bulb Problem
The first step is to replace the bulb with a new one. If the fuse has blown, first locate the fuse box and locate the appropriate fuse. Replace the fuse with a new one and test the headlights. And ensure that they are working correctly. The wiring may need to be inspected for any damage. If any damage is found, it must be repaired before the headlights can be used again.
3) Damaged wire or corroded ground Problem
The 2015 GMC Sierra headlights not working due to damaged wire or corroded ground is another common problem with vehicles of this model. A damaged wire or corroded ground Problem is caused when either the headlight wiring or the ground connection is damaged. This problem can also be caused by improper installation of the wiring or ground connection which in result prevents the headlights from working properly.
Solution To Fix Damaged wire or corroded ground Problem
The first step to fixing this issue is to inspect the wiring and ground connection. If the wiring is damaged, the entire headlight assembly will need to be replaced. If the ground connection is corroded, the connection needs to be cleaned and re-established. If the ground connection is damaged, it will need to be replaced. In some cases, the wiring may need to be replaced if it is too damaged to be cleaned or repaired. Once the wiring and ground connection is repaired, the headlights should work properly.
4) Faulty Ignition Problem
2015 GMC Sierra Headlights Not Working Due to Faulty Ignition is also pretty annoying. Faulty ignition will not only leave your headlights dead but it will also disrupt other functions. The most common cause of a faulty ignition problem is a faulty ignition switch. The faulty ignition switch is responsible for providing power to the headlights and other electrical components in the vehicle. If the ignition switch is faulty, it can prevent the headlights from turning on.
Solution to Fix Faulty Ignition Problem
The best way to fix a faulty ignition problem is to replace the faulty ignition switch. This can be done by a certified mechanic or by yourself. Depending on the severity of the issue, the switch may need to be replaced entirely or simply repaired. If the switch is replaced, it is important to make sure that the new switch is compatible with the 2015 GMC Sierra.
5) Malfunctioning PCM Problem
The PCM in GMC Sierra headlights is responsible for controlling the vehicle’s electrical system, including the headlights. When the PCM fails or malfunctions, it can cause the headlights to not work properly. A damaged or shorted wiring harness, incorrect PCM programming, a faulty alternator, and a faulty headlight switch can lead to Malfunctioning PCM problems.
Solution to Fix Malfunctioning PCM Problem
The first step is to check the wiring. Make sure that all of the wirings are connected properly and are not shorted out or damaged. If the wiring is OK, then the next step is to check the PCM programming. If the programming is incorrect, then the PCM will need to be re-flashed with the correct programming. If the alternator or the headlight switch is faulty, it will need to be replaced. Finally, if all else fails, the PCM may need to be replaced.
6) Blown Fusible Link Problem
A fusible link is a special type of electrical connector that is designed to melt and break in the event of an electrical overload. This is a safety feature that helps protect electrical components in the vehicle from being damaged or destroyed by an excessive amount of current. A blown fusible link problem is typically caused by an electrical overload in the headlight. This problem can also occur due to a short circuit, a faulty component, or an excessive amount of current being drawn through the system.
The solution to Fix Blown Fusible Link Problem
The only sure way to fix this problem is to replace Fusible Link with a new one. This should be done by a qualified technician or auto electrician. Depending on the vehicle, the new Fusible Link may need to be soldered into place. Once the new Fusible Link is in place, the electrical system should be tested to ensure that it is working properly.
7) Failed Body Control Module Problem
A body control module, or BCM, is a computer component in a vehicle that checks, regulates and operates electronic devices throughout the car. It works as a central hub for these devices, allowing them to communicate with each other. When it malfunctions, it fails to regulate the headlights and hence causes the issue. A Failed Body Control Module Problem can be caused by a range of issues, including a loose connection, a short circuit, or corrosion on the components. It can also be caused by a faulty unit that has been damaged due to an electrical surge or simply worn out over time.
Solution to Fix the Failed Body Control Module Problem
The best way to fix it is to replace the Body Control Module with a new one. If the issue is a loose connection or short circuit, then the affected components should be inspected and repaired if necessary. If the issue is corrosion, then the affected components should be cleaned, and the BCM should be reinstalled.
8) Blown High Beam Switch Problem
A Blown High Beam Switch is a common problem that can cause the headlights of a 2015 GMC Sierra to not turn on. High Beam Switch is a small switch located on the steering column near the headlight switch. This switch is responsible for sending a signal to the headlights, telling the headlights when to turn on and off. When this switch fails, the headlights will not turn on. A Blown High Beam Switch Problem can be caused by dirt or corrosion, a faulty electrical connection, or a switch wearing out over time.
Solution to Fix Blown High Beam Switch Problem
The best way to fix this problem is to replace High Beam Switch. This is a relatively easy repair that most people can do at home. First, you will need to locate the switch on the steering column once you have located the switch. You will need to unplug the wiring harness from it and remove the switch from the steering column. You should then be able to install the new switch and reconnect the wiring harness. After this is done, you should be able to turn on the headlights, and the Blown High Beam Switch should no longer be a problem.
9) Daytime Running Lights Problem
A Daytime Running light (DRL) is a safety device that controls the operation of the headlights in a GMC Sierra. The DRL is responsible for turning on the headlights whenever the engine is running. It also turns off the headlights when the vehicle is shut off. The DRL also controls the brightness of the headlights. This can be adjusted by the driver.
Daytime Running Lights problems can be caused by a variety of factors such as a faulty wiring connection damaged Daytime Running light (DRL), a blown fuse, a faulty control module, prolonged exposure to moisture or heat, or a faulty ground connection.
The Solution to Fix Daytime Running Lights Problem
The best way to fix this problem is to replace Daytime Running Light with a new one. Depending on the vehicle, the Daytime Running Light may be located behind the dashboard, in the engine bay, or under the hood. Before replacing the Daytime Running Light, it is important to check the fuse and wiring connections to make sure that they are not the cause of the issue. Once the Daytime Running Light has been replaced, it is important to test the headlights to ensure that they are working properly.
10) Faulty Alternator Problem
An alternator is a device in a vehicle that converts mechanical energy into electrical energy. It is responsible for charging the battery and powering all of the vehicle’s electrical systems. A faulty alternator problem can be caused by several things such as worn or faulty alternator belts. This is a belt, that connects the alternator to the engine.
The Solution to Fix Faulty Alternator Problem
If you suspect that your vehicle’s alternator may be faulty, you should take it to a mechanic. They will be able to diagnose the issue and replace the alternator if necessary. If the issue is with the alternator belt, they will be able to replace it as well.
Headlight problems in other car models:
- Fiat Panda Headlight Problems
- Vland Headlight Problems
- Kia Headlight Problems
- Eagle eye headlight problems
FAQs
Is it dangerous to drive my 2015 GMC Sierra with the headlights not working?
Yes, it is dangerous to drive a 2015 GMC Sierra with the headlights not working. Driving without headlights at night can significantly reduce your ability to see other drivers, pedestrians, and other obstacles. This increases the risk of an accident. Additionally, it is illegal in most jurisdictions to drive without headlights during certain hours.
How can I tell if the headlight bulbs on my 2015 GMC Sierra need to be replaced?
You can tell if the headlights appear dim or fail to come on at all. If this is the case, you can check the headlight bulbs for signs of wear or damage, such as cracks, discoloration, or a burned-out filament. It is also possible that a fuse or relay has blown. In this case, you should check the fuse box and/or the wiring harness for any signs of damage.
How much does it cost to fix the 2015 GMC Sierra headlights that aren’t working?
The cost to fix the 2015 GMC Sierra headlights that aren’t working will depend on the cause of the issue. In most cases, replacing the headlight bulbs should be relatively inexpensive. It can cost you around $50 or less. If the issue is caused by a blown fuse or relay, the cost should be minimal. However, if the wiring harness is damaged, then the repair costs may be higher.
Are the 2015 GMC Sierra Problems discussed above are also beneficial for other GMC Sierra models?
Yes, the GMC Sierra headlight problems discussed above are beneficial for all models of GMC Sierra including 2014, 2006, 2013, 2015, 2018, 2017, 2010, and 2011 GMC Sierra. Because the headlight problems in all these GMC Sierra models are the same.
What headlights problems does a 2015 GMC Sierra 1500 have?
Common headlight problems on a 2015 GMC Sierra 1500 include dim headlights, flickering headlights, and headlights that fail to come on at all. These issues can be caused by worn or damaged headlight bulbs, blown fuses or relays, or damaged wiring.
Conclusion
In conclusion, the 2015 GMC Sierra headlight problems are a little bit complex. But after reading the above article you will be able to resolve the 2015 GMC Sierra headlights not working dilemma. As, this article is full of knowledge, experience, and maintenance tips that will help you to effectively tackle these problems. Follow cooltechguide for more headlight problems.
