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could be u-joints or transfer case. gm Jim

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โˆ™ 2011-09-13 22:05:36
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Q: Why 1999 Blazer 4wd vibrating starts at about 20mph get worse to 50mph then quiets down picks up again around 70mph Had tires replaced Eng speed does not effect vibration but worse when accelerating?
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What would cause a 2000 Blazer to vibrate when you accelerate above 45mph and then stop vibrating when you stop accelerating?

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