Finding out noises from your car frequently is never comforting, so hearing noises on your GMC Sierra suspensions when you pass a speed bump can be stressing. This sign may be a sign of a insignificant problem as well as a warning of a much larger repair to come. Whatever the case, it is necessary to check the source and take the necessary actions to eliminate the problem, it is with this aim in mind that we wanted to write this article to help you see more clearly. We will first see the possible causes for a crack when the speed bump passes, after that, what can be the reason of a squeaking noise when a speed bump is being passed and finally what to do if you have another noise when a speed bump is passed.
Suspension cracking noise GMC Sierra
Check GMC Sierra suspension
If you notice a suspension noise when you pass a speed bump on your GMC Sierra, and it is categorized by a “clack” or cracking, it is highly plausible that your suspension block is the origin of it. In fact, it may be the suspension cups, which, when they are outdated, have the rubber (silentblock) that acts as a buffer and shock absorber for the upper part of the suspension that no longer fulfils its job during small bumps that compress the suspensions. To check if this is the problem that worries you, take a dented road and listen to the noise coming from your front axle as you pass over holes. If it is indeed the cups, think of replacing them fairly quickly or you may ruin other parts and have to make more important fixes.
Check the cardan shaft
If you are here because you have researched for “GMC Sierra suspension noise” and the suspension is not the cause of your problem, it may be that the cardan shaft is responsible. In fact, when the cardan bellows get out of date and the dirt/dust amasses inside them their action is degraded and it is possible to experience a sound when they are in torsion. To check this, you can try both types of torsion, first vertical with suspension compressions on the speed bump passages, and horizontal when you are going to turn at low speed. If it cracks in these two cases you should consider swapping it or them. If you have the feeling that this noise is more like a a loud noise on GMC Sierra, don’t hesitate to visit this content.
Check steering hinges/stabilizer bar
Finally, when you recognise a suspension noise when your GMC Sierra passes over a speed bumps, it is plausible that the hinges or the stabilizer bar are responsible. Exactly like the gimbals, the steering part is mobilized when you change direction. If this is the case, the components that may have been broken by usual wear and tear or impacts (e. g. sidewalks). The steering hinges, the stabilizer bar hinges. can be the causes of your noises, to check it, put it under the car and apply twists on each of its components to check that there is no particular play on one of them, they are meant to endure you quite strongly over their entire travel. Please remember to take your vehicle to your auto mechanic or change them if they are involved.
squeaky noise speed bump GMC Sierra
Check the stabilizer bar
If, alternatively, you have a noise that is more like a squeak when you pass a speed bump with your GMC Sierra, it is plausible that it is the stabilizer bar itself that is involved. In fact, abnormal/pronounced wear of the latter can cause irregular friction which can generate this squeaking noise. Please remember to check by passing under your car the condition of the paint on your bar which will reveal if there is friction. Second plausible point, it may be your stabilizer bar silentblocks that are dry and provoke noise, in which case disassemble them from the cradle and grease them, this should solve the problem.
Check engine silentblocks
Finally, last point that we can check together, it is the engine silentblocks, in fact, these silentblocks function as pads/shock absorbers between the engine and the cradle of the car, a noticable fatigue of these will make a subsidence and therefore a space between the engine and the silentblocks, it may happen that a squeaking noise shows up when you pass a speed bumps or any holes with your GMC Sierra. To swap them go to your auto technician.
Other speed bump noise GMC Sierra
If, despite all its assumptions, you still can’t uncover the origin of the noise your GMC Sierra makes when you pass a speed bump, we advise you to refer to this content on a loud noise on GMC Sierra or to visit your auto mechanic in order to carry an in-depth check on your GMC Sierra and determine this problem.
