For warranty work the dealer does the work (usually at a discount rate) and he is compensated by the manufacturer.

I often think about that when I am installing a $2200 diesel injector pump on a H1 which requires more than $500 of labor and all of it is covered under warranty.

And to answer the original question, if you properly maintain your vehicle and operate it as recommended (for example if you had an accident the damage would not be covered by your warranty) it will cover whatever it is supposed to cover.