Can I Refuse a Chemical Blood Alcohol Test?
When alcohol is involved in a traffic stop, the police officer will most likely ask you to submit to a chemical blood alcohol test like a Breathalyzer. While you are legally allowed to refuse the breath test, doing so will affect your driver's license under Wyoming and South Dakota's "implied consent laws."
In Wyoming, the first refusal results in a 6 month suspension. Second or subsequent refusals result in an 18 month license suspension.
In South Dakota, any time you refuse a chemical blood alcohol test it will result in a one year license revocation.