Front clunk noise and coolant smell fix

[XFMRMIKE]

Guys i know this has been brought up several times but i figured i'd post anyway. Seems that most threads i read through never end with a fix, just a GM rep or a dead end.

 

I currently have a 2014 GMC CC 4x4 with 56K

 

i brought my truck in to the dealer for a coolant smell and clunking sound coming from the front drivers side. Today i received a call back with the diagnosis.

 

Coolant smell was a radiator leak on the passenger side. ( yes there are many threads on this and i figured that may have been the issue)

 

Clunk sound was a loose tie rod on the driver side. ( i know there is a SB for the inner tie rod being loose or not torqued correctly from the factory ) I was told whoever did the alignment left it loose. I've only owned this truck for a week and a half so that might be the case. But knowing there is already a SB its hard for me to believe. Either way i'm happy if the noise is gone.

 

They had to order the rad so as soon as they are finished i will check for myself. As of now these are the fixes for my issues and i hope this helps just a little for anyone else.

 

I also have the same loose seat as everyone else which I've already ordered the parts to fix and what i believe the same vibration towards the rear between 70-80 mph. mine doesn't seem as bad as some videos I've seen but once the above issues are fixed i will move on to the vibration and resonance sound.

 

 

 

[michigan2500hd]

Guys i know this has been brought up several times but i figured i'd post anyway. Seems that most threads i read through never end with a fix, just a GM rep or a dead end.

 

I currently have a 2014 GMC CC 4x4 with 56K

 

i brought my truck in to the dealer for a coolant smell and clunking sound coming from the front drivers side. Today i received a call back with the diagnosis.

 

Coolant smell was a radiator leak on the passenger side. ( yes there are many threads on this and i figured that may have been the issue)

 

Clunk sound was a loose tie rod on the driver side. ( i know there is a SB for the inner tie rod being loose or not torqued correctly from the factory ) I was told whoever did the alignment left it loose. I've only owned this truck for a week and a half so that might be the case. But knowing there is already a SB its hard for me to believe. Either way i'm happy if the noise is gone.

 

They had to order the rad so as soon as they are finished i will check for myself. As of now these are the fixes for my issues and i hope this helps just a little for anyone else.

 

I also have the same loose seat as everyone else which I've already ordered the parts to fix and what i believe the same vibration towards the rear between 70-80 mph. mine doesn't seem as bad as some videos I've seen but once the above issues are fixed i will move on to the vibration and resonance sound.

 

 

 

I have the coolant smell periodically in '15 as well. Didn't realize this was a known issue. I wondered if my resonance could be caused by the active noise cancelling that comes with the 6.2 but if your 5.3 does it then that thery is out.

 

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[XFMRMIKE]

GM.OEMDTC.COM

Had info on the coolant smell showed rad leak and surprisingly head gasket.

 

There are also some on this site where guys were showing a leak in their radiator.

 

As far as the resonance/vibration I'm hoping a new drive shaft, yoke and all with a double cardan joint (CV) will fix the issue. A CV should cancel out the harmonics created. I can only hope.

 

I don't know much about the noise canclation if mine does doesn't have.

 

I will have to research more. I do know it's not the V4 mode causing it by simply putting the transmission in a lower gear to prevent it from turning on. Some sound.

 

From what I've read it can be anything from rear diff, body mounts to drive shaft. Being that gm uses a 1 piece aluminum shaft I'm assuming that is where the issue is.

 

I had a 13 6.2 4x4 never sounded like this.