My neighbor Darrel has a 2015 GMC. He had it back to the dealer several times for the vibration issue. They finally sent it to the engineers at the GM proving grounds in Milford. They had it for close to a month. Replaced tires, I think all 4 wheels and at least 1 half-shaft. They got his fixed but I'm not sure they know exactly what fixed it. I think it was the wheels, they were sent back to the manufacturer.
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Hank
70 Chevelle SS396(454), M20, 3.73
My Chevelle
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