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  • Name
    DAVID BROWN
  • Location
    Fruitland Md.
  • Drives
    2015 Denali HD pickup

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  1. 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.
  2. Traded my 2015 on a 2016 and it sounds perfect. The 2016 is a pleasure to drive unlike the 2015.
  3. It was dated Aug. 28 2016. He showed it to me. It was about 6 pages long.
  4. Don' t know. Parts were just ordered yesterday. Another person here said it took care of 95%. I actually traded the vehicle today for a new Yukon Xl. Mine was a 2015 and I'm getting a 2016. But I will test drive it first.
  5. My dealer received a TSB from GM dated Aug 28 telling them how to repair the problem. My dealer got approval to order and install a new exhaust system on my 2015 Yukon XL.
  6. I have a 2015 Yukon XL with the cabin noise issue same as everyone else. Been to the dealer and they could not fix it. Dealer says GM is designing a new exhaust system or at least modifying the old one. Something about a baffle near the end of the exhaust system. Noise is terrible, worst around 35 to 45mph when it is in the 4 cylinder mode. If you put it in the towing mode which cause the rpm's to rise the noise goes away. Wife always buys the Yukon XL but I think this will be the last one. Especially since it is taking GM so long to fix it. A fix should have been figured out a long time ago, does not make sense.
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