See also:

How the System Works
URPA comes on automatically when the shift lever is moved into R (Reverse). A single tone sounds to indicate the system is working. URPA operates only at speeds less than 8 km/h (5 mph). An obstacle ...

Fuel
For diesel engine vehicles, see “Fuel for Diesel Engines” in the Duramax Diesel Supplement. For Vehicles with gasoline engines, please read this. ...

Driver Information Center (DIC)
The vehicle has a Driver Information Center (DIC). The DIC displays information about this vehicle. It also displays warning messages if a system problem is detected. All messages will appear in the ...