When you apply for an air brakes endorsement on your Class A license, you will need to submit a completed application and pay the applicable fee. The SOS will then review your driving record and determine if you need to take the on-road driving test. If you have not had any moving violations in the past three years, you may not need to take the test. However, if you have had any moving violations in the past three years, you will need to take the test.
The SOS website states that "A driver who holds a Class A CDL without a passenger endorsement and wants to add the passenger endorsement must take the skills test only." This means that you will not need to retake the on-road driving test if you only want to add the passenger endorsement to your Class A license.
You can contact the Michigan SOS for more specific information about the requirements for obtaining an air brakes endorsement or a passenger endorsement on your Class A license.
