Diagnosis manuals focus more on the issue than just the make and model. For instance if you are looking to fix your carburetor then you can find a specific manual that will guide you to repair that part. Repair manuals can be found by a general are to fix the car as well. If you are trying to find out repair for mufflers then search car make, year and mufflers. Also you can find many articles that will have the information you need to make the repair. Maintenance manuals is most generic and can be used across most makes and models. If you are looking to change your oil then this type of manual can be used for most types of cars.