Vehicle and Power Issues
OnStar services require a vehicle electrical system, wireless service, and GPS satellite technologies to be available and operating for features to function properly. These systems may not operate if the battery is discharged or disconnected.
See also:
Trailer Sway Control (TSC)
The vehicle has a Trailer Sway Control (TSC) feature as part of the
StabiliTrak system.
If TSC detects that the trailer is swaying, the vehicle's brakes are
automatically applied.
When TSC ...
Leaving the Vehicle with the Engine Running
WARNING
It can be dangerous to leave the vehicle with the engine running.
The vehicle could move suddenly if the shift lever is not fully in P (Park)
with the parking brake firmly set. And, if you ...
Security
OnStar provides services like Stolen Vehicle Assistance, Remote Ignition
Block, and Roadside Assistance, if the vehicle is equipped with these services.
OnStar can unlock the vehicle doors remotely, ...