Diagnostics
OnStar Vehicle Diagnostics will perform a vehicle check every month. It will check the engine, transmission, antilock brakes, and major vehicle systems. It also checks the tire pressures, if the vehicle is equipped with the Tire Pressure Monitoring System.
If a diagnostics check is needed between e-mails, push 
, and an Advisor can run a check.
See also:
Additional Maintenance and Care
Your vehicle is an important investment and caring for it properly may help to
avoid future costly repairs. To maintain vehicle performance, additional maintenance
services may be required. It is ...
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 ...
Immobilizer Operation
This vehicle has a passive theft-deterrent system.
The system does not have to be manually armed or disarmed. The vehicle is automatically
immobilized when the key is removed from the ignition.
Th ...