Woman arrested 1 hour after stealing car in Norwood

Perfect. At 7:30 p.m. on Tuesday, Aleatha Stephens of Golf Manor stole a 2000 Chevrolet Equinox in Norwood, and Cincinnati police were able to arrest her and her female passenger an hour later on Reading Road in Avondale. The vehicle was equipped with an OnStar device that enabled police to quickly track her whereabouts. We must get one of these devices, but the Onstar website says they are factory-installed only and can't be added later. Does anyone know if there are other tracking devices that can be added and how much they cost?