Is SiriusXM radio free on cars with UConnect?

I bought a used car that has UConnect. I've been getting satellite radio so far, but I don't pay any subscription, and all the cars I've owned before would only give me it during SiriusXM's trial periods. I tried Googling it, but all I can find is that "UConnect" is essentially free if you buy it with the car, but there's a thing called "UConnect Access" that's a monthly subscription and will give you things like roadside assistance and turning your car off with your phone. My car is three years old and I bought it from a used car dealer, so I don't see why I'd be getting some SeriusXM trial period. Is the satellite radio subscription free, or am I in some sort of trial period that will end soon?