To dream that you are in a garage indicates a time of rest and relaxation in your life. You could feel that you are spinning your wheels or that there is no one to help push you in the right direction to achieve your dreams.
To dream that you are pulling your car into the garage indicates a sense of safety and steadiness that is the result of your achievement.
To dream that you are opening a garage door suggests that you have made a decision. You may have come to a conclusion regarding which direction to go in life. Or, if you are closing the garage door, you could be delaying making this decision so you don't offend or hurt those around you.