It is never enjoyable to perceive a sound in your automobile that you don’t know the origin of. So, what if you recognize a loud noise that is persistant on your GMC Sierra? It is highly possible that this is a minor problem, but before beeing sure, it is better to do some investigations. Whether that loud noise comes from the front of the vehicle, from the rear, whether it happens when you accelerate or when you are parked, our team has created this article to help you solve it. First, we will detail the possible causes for the issue according to when loud noise appears on your GMC Sierra, and then we will concentrate on the region of origin of the noise. In any case, if this noise remains, follow these instructions to help you find the origin.
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When does my GMC Sierra produce a loud noise?
One way to detect a noise from your GMC Sierra is to determine when it appears. Indeed, some problems can be related to components that are only stressed under certain circumstances. It is this technique that we will focus on in this first part.
Loud noise GMC Sierra when accelerating
Loud noise on GMC Sierra that shows up when you are accelerating can be symptomatic of multiple failures. Indeed, if you encounter a noise that is louder and louder when you accelerate, it can come from a faulty turbo that will generate a much higher noise than during normal process. Additionally, it is also highly possible that loud noise on your GMC Sierra is linked to a wheel bearing, which is one of the most common origins of these types of symptoms. Another possibility is that your exhaust pipe may have holes or a collar may have become loose. Finally, it is also possible that the problem may come from a deformed tire or an unbalanced wheel that will tend to vibrate as it gains speed.
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When my GMC Sierra is stopped
If your GMC Sierra makes a loud noise while not accelerating, engine on, the problem may be connected to poor air intake. An air intake hose that has come loose or has a hole in it may be the cause.
Where does loud noise come from on my GMC Sierra and how can I be sure of its origin?
Now that we have located the origin of the noise, we will concentrate on the verification stage to make certain that this is the concern you are experiencing.
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The loud noise comes from the wheels of my GMC Sierra
As we have seen earlier in this article, loud noise from the wheels of your GMC Sierra may be connected to two main problems. If it is one of your tired bearings, it will tend to make a thumping noise that intensifies when it is under stress (spins faster and faster). So keep in mind to check by driving “fast” (neutral gear on and window open to hear only the noise of the wheels) that the noise is located here, if this is the case replace it or them quickly. If it is a deformed tire, remember to visually check the entire tread area for linearity. If it is the balancing of the wheels of your GMC Sierra that is the matter, you will tend to feel a vibration in the direction of the vehicle as you go faster. In both cases, you will have to go to your auto technician to replace the tires or execute a balancing.
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The loud noise comes from the engine of my GMC Sierra
In case you have identified loud noise as coming from the engine of your GMC Sierra, the two most likely causes are turbo and air intake. In the first case, a turbo failure may also be linked to a compression loss during the engine ramp-up phase, so you should encounter a power loss during your acceleration. If the loud noise on your GMC Sierra is related to air intake, the check will be done mainly visually, check all your air intake hoses by a visual control in your engine block to be sure that it is not damaged or disconnected which would generate an air intake, if it is just disconnected you can reconnect the air intake tubes yourself. Then check that the engine idle speed is not random. In case you confirm one of these two trouble, take your vehicle to your garage .
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Loud noise comes from the exhaust pipe of the vehicle
If the noise you have detected comes from the exhaust pipe of your GMC Sierra, it is highly possible that you have rust if your vehicle is old and has created holes in it over time and therefore generates a very high noise close to aircraft noise on your GMC Sierra, that a part has been cut off due to wear, or, finally, that a clamp has become loose due to vibrations. To validate this, get help from someone who will stand under the vehicle while you accelerate to find the exact area of origin of this noise. If it is a hole, you can repair it with a putty provided for this purpose, or, if it is a collar, “reattach” it. If it is cut or the hole is too big, it is better to get closer to your mechanic.
