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O5 Sierra Denali vibration

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Old 07-08-2009, 11:56 PM
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Default O5 Sierra Denali vibration
Has anyone had this problem? I have an 05 sSierra Denali, and at about 70-75MPH, the truck starts to vibrate. The dealership balanced the drive shaft and replaced differential fluid, but that did not solve the problem. I know it's not the tires. You can feel it under the truck through the seat. It's almost like a humming sound. Thanks in advance for anyone's help who have had this problem and fixed it. - Matt
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Old 07-08-2009, 11:59 PM
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what size wheel and tire are you running?
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Old 07-09-2009, 12:12 AM
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it is the stock 17"
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Old 07-09-2009, 08:50 PM
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Is the truck the stock height or lowered? Could U-Joints be the problem?
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Old 07-10-2009, 04:55 AM
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It is stock height, and it does not make noise when in neutral.
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Old 07-10-2009, 01:36 PM
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Did you get the AWD version? It might be the Tcase. Best of luck getting it fixed
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