OnStar Vehicle Diagnostics can perform a vehicle check every month. It will check
the engine, transmission, antilock brakes, and other major vehicle systems. It also
checks the tire pressures, if the vehicle is equipped with the Tire Pressure Monitoring
System. If an On-Demand Diagnostics check is needed, press
, and an Advisor can run a check.
Connections
OnStar Additional InformationOff-Road Recovery
The vehicle's right wheels can drop off the edge of a road onto the shoulder
while driving. Follow these tips:
Ease off the accelerator and then, if there is nothing in the way, steer
the vehicle so that it straddles the edge of the pavement.
Turn the steering wheel about one-eigh ...
Cruise Control Light
For vehicles with cruise control,
the cruise control light is white when the cruise control is on and ready, and turns
green when the cruise control is set and active.
The light turns off when the cruise control is turned off. See Cruise Control
on page 9-30.
Door Ajar Light
This light come ...
What to Use
Warning
Adding only plain water or some other liquid to the cooling system
can be dangerous. Plain water and other liquids, can boil before the proper coolant
mixture will.
The coolant warning system is set for the proper coolant mixture.
With plain water or the wrong mixture, the engine coul ...