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    Newbie with 2016 Tahoe rough idle

    Alright, so just to end this thread, in case anyone has the same issue in the future. They put new shims. According to their Picoscope diagnostic tool, the trembling was reduced to within the "acceptable range". To me it's not perfect, but It's not horrible. Since I purchased this vehicle...
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    Newbie with 2016 Tahoe rough idle

    *****Update****. Dealer indicated GM wants them to install a new set of shims, on the motor mounts.
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    Newbie with 2016 Tahoe rough idle

    Exactly. At first I didn't realize there is an indicator that tells you when the vehicle is in V4 mode. But the vehicle still shows V8 when the rough idle exists. Either way, my previous 2016 Tahoe LS didn't vibrate like this. So it seems like a quality control issue. Unless the LS models...
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    Newbie with 2016 Tahoe rough idle

    *****UPDATE***** Completely unexpected. The dealership called me two Thursdays ago to tell the the part for the Picoscope came in, so I took it back in to the dealer this past Tuesday. They still haven't found the issue, but he told me he had a GM field engineer helping their tech.
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    Newbie with 2016 Tahoe rough idle

    Three weeks since I first took my Tahoe in to the dealer, and they told me they're still waiting for the Picoscope part. So i finally picked it up my Tahoe from the dealer. It had been sitting there in their back lot, untouched. The service advisor told me the part they are waiting for hasn't...
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    Newbie with 2016 Tahoe rough idle

    Well it's been a week since the service advisor told me they would need to order a longer sensor for the pico scope. He gave me the option of picking it up and they would call when the part came in, or leaving it at the dealership. I chose to leave it at the dealership, believing that they...
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    Newbie with 2016 Tahoe rough idle

    It's pretty much what you've described. If you've ever had a vehicle shut off on you at a stop. It's kind of like that, but not to that extreme. As far as the tach, it is barely noticable. But it only happens under 500 rpm's. I used to have a Chevy Colorado 1st gen that did something very...
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    Newbie with 2016 Tahoe rough idle

    I'll have to try that.
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    Newbie with 2016 Tahoe rough idle

    Thanks. Will do.
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    Newbie with 2016 Tahoe rough idle

    Actually it does, a little bit....lol.
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    Newbie with 2016 Tahoe rough idle

    It might be the same thing as mine. The vibration is minor, and not always there. It seems to develop after the vehicle is driven about a mile or two. My biggest concern is that it will get worse.
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    Newbie with 2016 Tahoe rough idle

    Hello everybody, I'm new here. I thought I'd skip the intro thread and go straight to the point. I apologize if the following topic has been beat to death, but I didn't see any recent enteries and I'm becoming very frustrated. Here's the story: Last summer we purchased a new black Tahoe LS...

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