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Old 08-18-2018, 10:53 PM
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The "Chevy Shake"

I know this has been posted in here somewhere, but was looking for a direct answer.

Truck: 2014 Chev 1500 High Country, 6.2 ltr

Problem: Very noticeable shimmy/vibration once at 75 mph and faster. Did they ever find the problem? I know Aric has some knowledge on this, but couldn't find the thread.

From my research, it appears to be crappy OEM Driveshafts that are having issues. I was just curious of what the Forum brethren thought about this, thanks. When I bought the truck 3 years ago, I don't recall noticing this issue, being aware if it I assumed the problem was fixed prior to my purchase.
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Old 08-18-2018, 11:55 PM
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So I had my 2015 in the shop (bought new in 2015, was in the shop for a month) and they shimmed the rear end and it went away.
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Old 08-19-2018, 12:08 AM
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Great, thanks
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Old 08-19-2018, 08:42 AM
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It can be a tire issue as well. In the late 2000's the Chevy Tahoe PPV had this issue appear at speeds near 70 and above and it was caused by defective Goodyear Eagle RSA tires. Goodyear replaced the tires and the issue went away. The belting in the tires formed flat spots when the vehicle sat for a period of time. Goodyear changed the belting material. If you have ever flat spotted your tires it would give the same effect. FWIW
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Old 08-19-2018, 11:10 AM
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It can be a tire issue. It can be a drive shaft issue. It can be an alignment issue. Not sure if they even know. We had 3 of ours that had it. They rebalanced the tires so many times. It would go away for a week and come back. They even added insulation to the hood on one of them. Sore subject for me. Hopefully what they did to arik’s will work. Our experience was just hope they could get most of it to go away.
We are now alternating Ford and Chevy (partner Still likes Chevy and sour about ford 6.0).
They never tried what Aric said. Next time we take one in we’ll mention that. We have 2 that still do it when hooked to a trailer.
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Old 08-20-2018, 05:01 PM
curver900 curver900 is offline
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i have 14... they need to put a pico computer on it.. mine was a combination of excessive run out in the rearend.. ended up with a new rear end and then all my tires have to be road force balanced.. no driveshaft issues.....

Good luck..
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Old 08-20-2018, 06:09 PM
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Quote:
Originally Posted by curver900 View Post
i have 14... they need to put a pico computer on it.. mine was a combination of excessive run out in the rearend.. ended up with a new rear end and then all my tires have to be road force balanced.. no driveshaft issues.....

Good luck..

Funny thing. We’ve been lots of places, only place that’s been successful at balancing the tires to remove most of the shake is the FORD dealer.
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Old 08-21-2018, 12:12 AM
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I have a full bumper to bumper warranty, up to 100k miles, so I am going to drop it off at the local Chev dealer and say "fix it." We will see the B.S. they spew...they can test it all they want. I will then present all the various solutions we have discussed, and the few others I have read about on GM forums....
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Old 08-21-2018, 09:34 AM
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The more I read on here the more and more anxiety I get about replacing my Suburban with a newer one this fall/winter. Shaking, cracked dashes, AFM and bad lifters/valves/etc.,..... And the only alternative to a Suburban is an Expedition XL which is hardly a truck.....(sigh).
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Old 08-21-2018, 09:36 AM
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My old manager just mentioned to me a month or so back that he was reading about the GM vibrations issue and the article stated the issue was caused by the torque converter slipping in lockup. The fix was literally as easy as doing a couple fluid flushes... unfortunately I went through tires, a front axle, and the dealership putting an intermediate shaft from a Yukon in my ‘15 half ton before GM bought it back.
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