When you drive for companies, don't they have their own shops so that they can service the trucks (oil changes, tire changes, etc.)? But what if something happens over the road? For instance, say your truck starts running hot and you can't figure out what is wrong with it. Where would you take it to have it checked?
(Note: When I was born, I may have been blessed with a few talents,
but those talents were NOT in the automotive field; I am NOT a mechanic
)