Question: how much does it cost to subscribe to onstar?
Answer: Priced at $34.99 per month or $349.90 per year, the Guidance plan includes: OnStar Basic Plan features: Keyfob services that enable owners to remotely start, lock/unlock doors, as well as activate the horn and lights from the myChevrolet, myBuick, myGMC or myCadillac or OnStar RemoteLink app. OnStar Vehicle Diagnostics.