Reactivation for Subsequent Owners
Push 
and follow the prompts to speak to an Advisor as soon as possible after acquiring the vehicle.
The Advisor will update vehicle records and will explain the OnStar service offers and options available.
See also:
Engine Cover
A. Oil Fill Cap
B. Engine Cover
To remove:
1. Remove the oil fill cap (A).
2. Raise the engine cover (B) to release it from the retainers.
3. Lift and remove the engine cover.
4. Reverse Steps ...
Battery Voltage and Charging Messages
BATTERY LOW START VEHICLE
When the vehicle’s battery is severely discharged, this message will display and four chimes will sound. Start the vehicle immediately. If the vehicle is not started and t ...