According to the State of Michigan Public Act 190 Sec. 2110b.

(1) An automobile insurance policy and an automobile insurer and its employees, agents, and adjusters shall not unreasonably restrict an insured from using a particular person, place, shop or entity for the providing of any automobile repair or automobile glass repair or replacement service or product covered by the policy.

(2) An automobile insurer shall disclose, prior to or at the time a claim is filed with the insurer, whether the insurer has an agreement with any repair or replacement facility to provide a repair or replacement service or product to an insured and shall inform an insured that he or she is under no obligation to use a particular
repair or replacement facility.
 

If you feel that you are a victim of insurance company steering please take a minute to fill out a complaint form on the State of  Michigan Website.