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 
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Advisor can run a check.
See also:
Engine Compartment Overview
6.2L V8 Engine
A. Engine Air Cleaner/Filter .
B. Coolant Surge Tank and Pressure Cap. See Cooling System .
C. Remote Positive (+) Terminal. See Jump Starting .
D. Battery ...
Services for People with
Disabilities
Advisors provide services to help
subscribers with physical disabilities
and medical conditions.
Push for help with:
- Locating a gas station with an
attendant to pump gas.
- Finding a hotel ...
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 ...