'Service' as in oil and filter changes and such, belts, hoses etc, can be done by any auto repair shop.
Repairs, well that depends on what needs repair. But as far as I know, parts and shop manuals are available to anyone. In fact if wanted to order a whole new transmission online, for 8 grand, and stab it in the van myself, I can do that. (ain't happening, by the way!)
Recalls? yes, like any vehicle, that is usually done by the dealer OR sometimes by a third party as long as the recall repair or service is done according to the recall documentation.