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Posted

 

Maybe just maybe we can all be happy with our Yukons again!!!!

I'm glad to have helped!

Did you suffer pressure in your ears before ? I really can't understand how the exhaust and muffler related to this issue !!

In my case i feel excessive pressure effects my ears and sinuses and harmonic noise in my head especially in low speed. Last week i drive for 2 hours over 110 m/s and noticed that no more pressure in that's speed. The buffeting in my tahoe is hardly to hear it between 60 to 70.

Posted

Can someone post links to the latest versions of TSB5318 and 5404? I want to print them off and take them to my dealership. I can't them the get off there butt and get the exhaust upgrade going - they ignore my calls completely now! Might have to drive it into the service bay and have a hissy fit! Lol. (I wouldn't do something like that!)

 

Thanks

Posted

Did you suffer pressure in your ears before ? I really can't understand how the exhaust and muffler related to this issue !!

In my case i feel excessive pressure effects my ears and sinuses and harmonic noise in my head especially in low speed. Last week i drive for 2 hours over 110 m/s and noticed that no more pressure in that's speed. The buffeting in my tahoe is hardly to hear it between 60 to 70.

Yes. I had the buffeting/throbbing/low pressure noise inside my head as soon as I was driving it home from purchase. I notified the dealer as soon as I got home. I heard/felt the pressure at speeds between 30-55, mainly when the vehicle shifted and stayed in V4 mode. This is why I would have bet my first born that it was a transmission/harmonic balance issue.

When they told me they were going to try the 2nd exhaust/muffler, I literally rolled my eyes. I knew it had NOTHING to do with that. But I guess I was wrong. Believe me, I was in complete shock that it fixed the issue.

  • Like 1
Posted

Can someone post links to the latest versions of TSB5318 and 5404? I want to print them off and take them to my dealership. I can't them the get off there butt and get the exhaust upgrade going - they ignore my calls completely now! Might have to drive it into the service bay and have a hissy fit! Lol. (I wouldn't do something like that!)

 

Thanks

I am not sure where to find them...but is was the 5404B service bulletin that finally fixed mine.

Posted (edited)

Called my dealership and he says the new exhaust in PIT5404 is only for 5.3L engines.

 

There's no new exhaust for 6.2L.

 

Sucks.

Edited by SierraMyst
Posted

i tuned my car and cancel v4 v8 mode and installed a custom catback also replaced the tires with another brand,car runs much better than before but still have some vibration spiealy on 60 to 80 mph.

Posted

I'd be interested in knowing how many of you having the booming and buffeting are 5.3 or 6.2 since the exhaust is a 5.3 only fix.

Posted

The bulletin the dealer showed me told the dealer to remove a muffler from another new vehicle on their lot and try it on the 6.2l. If it works order a replacement muffler. The bulletin dealt with both engines.

Posted

My 2015i Suburban is at the dealer right now addressing multiple issues including this one. I am going to give them the new PIT number and will report back. Thanks for the detail!

Posted (edited)

The bulletin the dealer showed me told the dealer to remove a muffler from another new vehicle on their lot and try it on the 6.2l. If it works order a replacement muffler. The bulletin dealt with both engines.

If there's anyway you can call your dealer and ask for the PIT number that includes the 6.2L exhaust, it would be greatly appreciated.

 

My dealer insists that the exhaust fox is only for 5.3s and the Active Noise Cancellation is the issue on the 6.2s.

 

They've had the truck 28 days now at the dealer ship and are still trying to balance the sake shitty f******** tires.

Edited by SierraMyst
Posted

Does anyone know where to find the build date of the vehicle? I looked on the tire placard on the door and didn't see anything.

 

Pretty sure it is on the window sticker.

Posted

Does anyone know where to find the build date of the vehicle? I looked on the tire placard on the door and didn't see anything.

On the bottom corner of the drivers side door. There a sticker with a 4 digit month/year.

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