See also:

How the System Works
URPA comes on automatically when the shift lever is moved into R (Reverse). The rear display briefly illuminates to indicate the system is working. URPA operates only at speeds less than 8 km/h ...

ENGINE OIL HOT, IDLE ENGINE
This message displays when the engine oil temperature is too hot. Stop and allow the vehicle to idle until it cools down. ...

Navigation
This display is used for the OnStar or Navigation System Turn-by-Turn guidance. See OnStar Overview or the navigation manual, if the vehicle has navigation, for more information. ...