It is never pleasant to notice a sound you don’t know about, and which comes from your car. So, what if you spot an exhaust noise that persists on your GMC Yukon XL? It is highly probable that this is a minor issue, however, before being sure, it is better to operate some checks. Our team has created this to support you solve it. First, we will look at the possible reasons if you have a muffled exhaust sound on your GMC Yukon XL and second, if you have a metallic rattling noise on your GMC Yukon XL.
Muffled exhaust noise GMC Yukon XL
Exhaust pipe with holes GMC Yukon XL
Having a muffled sound from its exhaust is not insignificant and can lead to over-consumption, or a malfunction of the car engine, which could after a while become dirty, for example. If you have an exhaust noise on your GMC Yukon XL, it is possible that it is due to a hole in the exhaust pipe, this is the most typical reason. To be able to confirm this, position someone under the running motor automobile and accelerate to help them recognize the starting point of the hole. Once determined, if it is not too large you can cold seal it with specific metallic mastic type legs. Otherwise, the section will have to be replaced.
Element dislocated exhaust pipe GMC Yukon XL
The other possibility of being the subject of a muffled exhaust noise on GMC Yukon XL is to have a part of the exhaust system that has dislocated due to vibrations for example. In fact some junctions of the different parts of the pot can loosen after some time and generate an exhaust gas leak in places not intended for this goal. These fumes will then produce a loud noise. Same technique as above, we go under the GMC Yukon XL to establish the issue place, and tighten or swap the bolts. If you hear a muffled sound but after checking it doesn’t seem to come from the pot itself, think about looking at this document which gives solutions gives solutions about rear end noises on GMC Yukon XL.
Metal rattling exhaust sound GMC Yukon XL
Damaged exhaust muffler noise GMC Yukon XL
If, alternatively, you are exposed to an exhaust sound that is more of a metallic sort of, it is possible that one or more parts of your exhaust may be damaged. Indeed, it is conceivable that either your baffles, the catalyst or the silencer are the induce of this noise. To make sure, go under your GMC Yukon XL, cold, and tap each of the previously stated parts with a hammer to establish the origin of the noise. You should move things between things in the problematic part, if they are baffles, you can try to push the section a little bit to try to block them and thus limit their movements. If it is a dead catalyst, it will be necessary to consider changing it, as well as the silencer. In this case, to stop the exhaust noise on your GMC Yukon XL, you will either have to find a second hand one and do it yourself, or go to your mechanic.
Metal rattling exhaust noise GMC Yukon XL : Silentblock, loose pot
Finally, a metallic exhaust noise on your GMC Yukon XL may be related to a poor attachment of your exhaust to your automobile. In fact, over time, vibrations, the pot fasteners on the automobile chassis can come off. In this case, you need to check, when cold, that the pot holds well, to try to get it to move in different directions and watch how it reacts. Backwards there should be some play and be able to move but not too much. The closer you get to the engine motor, the more fixed it should be. Visually check the fasteners for which you have doubts. Finally, it is possible that a silentbloc may have died . In this case it will have to be replaced.
