Do you listen to a metallic noise on your GMC Sierra once you drive? We know that this is not enjoyable and that you have questions. Experiencing such a noise is not always a good indicator, but it may also be nothing serious. To support you solve this trouble, our team has decided to create this content to help you in this research. In order to accomplish this research as efficiently as possible, we will first have a look at the possible sources of metallic noise in the front of your vehicle, and then, if the metallic noise comes from the rear of your vehicle.
Metal noise GMC Sierra coming from the front end of the vehicle
I experience a metal rattling noise coming from wheels
- Metallic noise coming from your bearing
- Metalic noise coming from brake
- Stabilizer bar worn
One of the possible causes of metal noise symptoms on your GMC Sierra, may be that one of your bearing is tired, it will frequently make a loud noise that raises when stressed (turns faster and faster). So keep in mind to examine by taking speed (neutral gear and window open to listen only to noise of the wheels) that the noise is well based here, if this is the case swap it or them fairly quickly. If, on the other hand, this noise only manifests itself with an engaged speed, read this guide on loud noise on GMC Sierra, you will most likely find a solution to your trouble.
If you notice a metalic noise on GMC Sierra and you have the feeling that it comes from your front wheels, it is highly possible that it is your pads or discs that are the cause. Indeed, a disc or a set of dead plates will create a strong metallic friction noise that you will inevitably feel. To examine this, put your vehicle on safety stand, and examine the state of your discs and pads by removing the wheel. If they are involved, swap them quickly , otherwise you will no longer be able to brake. If you experience a metallic noise from your vehicle, and you want informations about it, read this article for more details about brake noises on xxx.
If it is rather when you are turning, passing over a bump or sidewalk that you experience a metallic noise on your GMC Sierra, then your rods may be worn. Whether it is the steering or the stabilizer bar, their wear will trigger a metallic snap when they hit or change direction. To examine this, position yourself under your vehicle, without the wheels, and move your rods, if they only oppose very little force it is likely that they will have to be replaced. If this is your case, we recommend highly that you consult this content for a complete guide about steering noises on GMC Sierra.
Other sources
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- Engine silentblock
- Dead gearbox, or broken pinion
A bit like worn stabilizer bar, if your engine silent blocks are harmed, you will feel as you pass over damaged roads or sidewalks, loud metallic noises on your GMC Sierra. Once screwed up, they will no longer fulfill their function as shock absorbers and, with each impact, or violent acceleration, a noise will arise. Therefore, bear in mind to examine their status and swap them if necessary. Feel free to read this content which is a complete file about strut mounts noises on GMC Sierra, how to examine their state and swap them.
Finally, the last basic cause of metallic noise on GMC Sierra. It’s because your transmission system is the origin. It is plausible, either because of improper use of the gearbox or because of excessive wear, that some gears in your gearbox have broken and are wandering around in it. They will then create a continuous metal rattling sound. That you shouldn’t feel in neutral. If this is your case, we recommend highly that you read this detailed guide on the origins of steering noises on GMC Sierra.
Metallic noise GMC Sierra coming from the rear end of the vehicle
Exhaust pipe
If, on the other hand, you feel an exhaust noise that is more of a metallic type, it is possible that one or more parts of your exhaust may be damaged. Indeed, it is possible that either the catalyst or the silencer may be the cause of this sound. To be certain, go under the vehicle, cold, and knock each of the previously stated parts with a hammer to discern the origin of the noise. You should notice things moving in the problematic part, if it’s the exhaust baffles, you can try to hammer in the section a little to try to block them and limit their movements. If it is a dead catalyst, it will be required to consider changing it, as well as the silencer. In cases like this, to eliminate the metallic noise on your GMC Sierra, you will either have to find a second hand one and do it yourself, or go to your mechanic.
Noise from wheels
- Bearings
- Brake pads or discs
As for the bearings of your vehicle, it is possible that with wear they are at the origin of your metallic noises on your GMC Sierra. Go a little further up in the content where you will find information of the solution already exposed for the front part of the vehicle.
Finally, if the noise originates from your discs brakes or pads, you should refer to the part in question in the first section of this manual.
