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:
Instrument Panel Fuse Block
The instrument panel fuse block is located in the center console between the
driver and passenger seats. To access the fuses, open the fuse panel door from
the passenger side by pulling it out.
...
When It Is Time for New Tires
Factors such as maintenance, temperatures, driving speeds, vehicle loading,
and road conditions affect the wear rate of the tires.
Treadwear indicators are one way to tell when it is time for ...
Special Application
Services
- Vehicles with manual
transmissions: Every two years
drain, flush, and fill clutch
hydraulic system.
- Severe Commercial Use
Vehicles Only: Lubricate
chassis components every
5 000 km/3, ...