Read up on the difference between physical dependence and addiction. Physical dependence to vicodin is best handled by tapering off the medication at some slow rate-- take a period of about two months and and reduce the dose according to a pre-planned schedule. Once you start to taper off, you will want to stick to the schedule without any variation. If you start to make exceptions for avoiding a dose reduction you will never get there.
If you have become addicted, things will be more difficult. Consider 'addiction' if you cannot reduce the dose to taper off, even after several tries. If you are addicted, seek the help of a doctor specializing in addiction.
As for symptoms of withdrawal, they will be less if you taper slowly, but will include chills, diarrhea, sweating, body aches, cramps, depression... The intensity will depend to some extent on the level of tolerance you have established. But if we are talking just about pain pills, seizures are rare, and the withdrawal is not generally life threatening.
thank you for your response. i will begin tapering and see how that goes. i already have been reducing my afternoon dose to just one pill. i appreciate your help. thanks!