If you have to perform maintenance for your Suzuki GS 550 E then it will always be a good plan to have access to a Workshop Manual to keep just for a reference should you need to know simple methods to strip off a specific part including Door and fit it again successfully.
Suzuki GS 550 E Workshop Manuals will provide you with precise diagnostic information for the car so if something is not working it can help you determine what the issue is and methods to make it better. After that you can evaluate if you can do this by yourself or in case the job is just too big you can actually book your GS 550 E in with a nearby car garage.
Suzuki GS 550 E manual