Underbody Maintenance
Use plain water to flush dirt and debris from the vehicle's underbody.
Your dealer or an underbody car washing system can do this. If not removed, rust and corrosion can develop.
See also:
Turn and Lane-Change Signals
An arrow on the instrument panel cluster will flash in the direction of the turn
or lane change.
Move the lever all the way up or down to signal a turn.
Raise or lower the lever until the arrow ...
How to Add Coolant to the Coolant Surge Tank for Gasoline Engines
If the vehicle has a diesel engine, see “Cooling System” in the Duramax Diesel Supplement for the proper coolant fill procedure.
WARNING
You can be burned if you spill coolant on hot engine part ...
Parental Control
The RSE system may have a Parental Control feature, depending on which radio the vehicle has. To start Parental Control, press and hold the radio power button for more than two seconds to stop all sys ...