See also:

Ultrasonic Parking Assist
If available, the Ultrasonic Rear Parking Assist (URPA) system assists the driver with parking and avoiding objects while in R (Reverse). URPA operates at speeds less than 8 km/h (5 mph). T ...

Horn
Press near or on the horn symbols on the steering wheel pad to sound the horn. ...

System stays in background
While I only got to drive the 2012 LaCrosse for a little over an hour, I was impressed at how utterly unimpressive the eAssist was. Everything works in the background. There's no electric motor wh ...