Citroen GS 2.0 Workshop Manuals
If you need to execute fixes for your Citroen GS 2.0 then it will always be a good plan to own a Workshop Manual to use as a reference in the event that you need to know the way to take off a particular component much like the Exhaust and install it again properly.
Citroen GS 2.0 Workshop Manuals will give detailed diagnostic info on your automobile so if something is faulty it will help you understand what the situation is and how to correct it. You will be able to decide if you can do this on your own or if ever the job is too big you can make a booking for your GS 2.0 in with a decent garage.