car shaking up and down on 2004 Oldsmobile Bravada

just started today, car seems to have sunk about 3to four inches, tires are fine

by in Birmingham, AL on February 13, 2014
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2 answers 3 comments
ANSWER by , February 13, 2014
While truning steering wheel sharp left or right?
COMMENT by , February 13, 2014
no,just going down the road
COMMENT by , February 14, 2014
Have tires checked, may have an 'out of round' problem.
ANSWER by , February 14, 2014
are you in any snow
COMMENT by , February 14, 2014
was last of January,but this started after that event