CDL's are federally regulated and therefore, suspensions are quite uniform across the country. If this is your first DUI then it will be revoked for a period of 1 year. If, however, this is your second DUI then your CDL will be revoked for life.
Mr. Glass is correct with one possible exception. If this is a second DUI, the first one may not affect CDL status if it occurred before September 2005. That is when the federal law resulting in lifetime suspensions for a second DUI went into effect. If the first DUI was before the effective date of the law, the CDL issue will be a matter of state law - some states look at any second DUI while others only count those after the effective date. If this is a second and you are in one of the bad states, see a DUI specialist lawyer for help. He may be able to convince the BMV to only count post-2005 offenses.
A roundup of the best tips and legal advice.