Languages
The vehicle can be programmed to respond in French or Spanish.
Push 
and ask an Advisor.
Advisors can speak French or Spanish.
See also:
Digital Speedometer
The speedometer shows how fast the vehicle is moving in either kilometers
per hour (km/h) or miles per hour (mph). The speedometer cannot be reset. ...
Washer Fluid Messages
WASHER FLUID LOW ADD FLUID
This message may display when the washer fluid level is low.
See Washer Fluid. ...
Place a Call Using a Stored
Number
1. Push . System responds:
“OnStar ready.”.
2. Say “Call <name tag>.”.
System responds: “OK,
calling <name tag>.” ...