My 2004 envoy has a gringing vibration through the vehicle while driving straight and to the right, but not the left. It is not through the steering wheel or gearshift just feel it from the floor.
I too have a Envoy....has been one of the best .. sounds like the Spindle bearing. Comes as a sealed unit. good luck
start by checking the wheel bearings
I have just replaced the drivers side for that reason and the sound and vibration is still there. Summer time is good.
if the sound is still there get it up on a lift and have someone listen while you spin tires...sound will travel . hope you find it without spending extra money. Mechanic thought the rear end was bad in mine..I spun the L/F and got lucky...
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