Infrequent Noise

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dlchice

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Hello Everyone. I am new to the GMC forum and please accept my apologies if there has been a previous posts to my problem. I have a 2004 GMC Envoy XL with close to ~140k miles on it. When driving the vehicle, between 0 - 30/40mph, it makes a grinding noise, like it is not going into gear. This does not happen all the time and is infrequent, but it bothers me especially when I have two small children in the vehicle. I do not "trust" the vehicle and would like to get it fixed. I have brought it to the dealer, have test drove it but since the noise in infrequent, they do not know where to begin. The service technician that drove the vehicle thought that it may be the 4x4 going into gear but was not 100% sure. Has anyone had a similar experience with the grinding noise and would you know what is causing it (e.g. wheel bearing, drive train, 4x4, etc.)? Please help. Still love the look of the vehicle and hate to give it up because of this. Thank you for your responses. :confused:
 
If it's not the idler pulley, can you be more specific as to where the noise is coming from...engine area or transmission...also, with engine in neutral and idling, rev the engine to 2500 rpm for a few seconds and see if the noise starts or increases, or starts and disappears.



dlchice said:
Hello Everyone. I am new to the GMC forum and please accept my apologies if there has been a previous posts to my problem. I have a 2004 GMC Envoy XL with close to ~140k miles on it. When driving the vehicle, between 0 - 30/40mph, it makes a grinding noise, like it is not going into gear. This does not happen all the time and is infrequent, but it bothers me especially when I have two small children in the vehicle. I do not "trust" the vehicle and would like to get it fixed. I have brought it to the dealer, have test drove it but since the noise in infrequent, they do not know where to begin. The service technician that drove the vehicle thought that it may be the 4x4 going into gear but was not 100% sure. Has anyone had a similar experience with the grinding noise and would you know what is causing it (e.g. wheel bearing, drive train, 4x4, etc.)? Please help. Still love the look of the vehicle and hate to give it up because of this. Thank you for your responses. :confused:
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We cannot help you about this grinding noise issue because it could be many reasons of this issue so just try to find it out otherwise go to garage to identify issue.
 
dlchise, have you solved your problem? In addition to a bad idler pulley, does this occur when you have the air conditioner engaged? One other thing that could cause this might be a bad fan clutch. We had a fan clutch fail in Las Vegas several years ago, and though the noise was not that loud, it did make an odd sound.
 
dlchice said:
Hello Everyone. I am new to the GMC forum and please accept my apologies if there has been a previous posts to my problem. I have a 2004 GMC Envoy XL with close to ~140k miles on it. When driving the vehicle, between 0 - 30/40mph, it makes a grinding noise, like it is not going into gear. This does not happen all the time and is infrequent, but it bothers me especially when I have two small children in the vehicle. I do not "trust" the vehicle and would like to get it fixed. I have brought it to the dealer, have test drove it but since the noise in infrequent, they do not know where to begin. The service technician that drove the vehicle thought that it may be the 4x4 going into gear but was not 100% sure. Has anyone had a similar experience with the grinding noise and would you know what is causing it (e.g. wheel bearing, drive train, 4x4, etc.)? Please help. Still love the look of the vehicle and hate to give it up because of this. Thank you for your responses. :confused:
Click to expand...

Common for the 4WD axle disconnect assembly to fail which will cause the issue you have described. The grease in the assembly will dry out due to time and heat which causes the bearing to fail.

The infrequent noise coming and going are the early stage of the assembly to fail and will need to be replaced before it damages the spins on the half shaft also. Try to find a rebuilt 4WD axle disengage assembly, a new one is very expansive :(

Keep us posted.
Molson02536
 
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