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2008 gmc envoy_slt
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10 Posts
Discussion Starter · #1 ·
During acceleration, I have a vibration throughout the whole vehicle. When I let off the gas the vibration stops. The vibration is nothing violent, but very noticeable.

Thank you,
Bryan
 

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2003 gmc envoy_slt
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628 Posts
With the vehicle safely on stands, in neutral with park brake off...

...grab the drive shaft on each side of the U-joint with your hands and rotate opposite alternating directions. If you feel ANY slack the U-joint is bad.

Grab the shaft near the U-joint and push up and down, ANY movement in the U-joint and it is bad. Not to be confused with looseness at the spline at the transmission tail shaft, although if that is real loose it too can cause vibration.
 
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