Radio =subscription) U2L - High Definition Radio Reception U42 - Entertainment System, =ear Seat UDS - =arking Assist, Front & Rear Sensors UE1 - OnStar Communication =ystem UEU - =ensor, Forward Collision Alert UFG - Sensor, Rear Cross Traffic Alert UG1 - Homelink Garage Door =pener UHX - =ane Keep Assist/Depa