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Mysterious, Unfixable ‘Chevy Shake’ Affecting Pickup Trucks Too

Looking at buying a Chevy Silverado or GMC Sierra? You may be in for a turbulent ride.

GM engineers can’t seem to pinpoint the cause of a mysterious recurring issue in vehicles riding on GM’s K2XX platform, which includes its full-size trucks and SUVs, a problem that was referred to by one dealer as 'The Chevy Shake.' Because GM can’t isolate the cause of the problem, a permanent fix has also been elusive.

In December, ran a report detailing buffeting and vibration issues found in some GM full-size SUVs after being contacted by an owner who was experiencing these problems. While investigating the SUV issue, another flaw with different GM vehicles surfaced repeatedly in online forums and in the National Highway Traffic Safety Administration’s complaints sections: vibrations from the 2014 and 2015 Chevy Silverado and GMC Sierra.

While SUV owners complain of buffeting causing headaches and dizziness, GM half-ton owners claim there is an insistent vibration in their trucks. 'While driving at speeds above 45 mph, there is a vibration from the rear of the vehicle,' reads a complaint on the NHTSA database. 'Dealer advised it was wheel balance and balanced the tires with no relief. Have since replaced all four tires with no relief.'
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Had the same problem with my 2013 Silverado 1500, factory tires, started about 1 year and 30K miles after new. Shake wasn't bad or dangerous, but annoying as it rattled the crap in my cupholders etc.
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