If you need to do fixes on your own Suzuki GS 500 then it will always be a good idea to have a Workshop Manual to use as a reference in the event that you want to know proven methods to remove a certain part for example the Door and install it again adequately.
Suzuki GS 500 Workshop Manuals are able to offer certain diagnostic info with regards to your automobile therefore if something is faulty it will help you ascertain what the issue is and how to make it better. Then you are able to evaluate if this can be done yourself or in case the job is just too big you are able to make a reservation for your GS 500 in to a trusted mechanic.
Suzuki GS 500 manual