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:
Storing the Tire Sealant
and Compressor Kit
(Sedan)
The tire sealant and compressor kit
is located in the trunk in one of the
following locations.
A. Tire Sealant and Compressor Kit
B. Foam Container
C. Wing Nut
1. Open the trunk. See Trunk ...
Feature Settings Menu Items
The following are customization
features that allow you to program
settings to the vehicle.
Display In English
This feature will only display if a
language other than English has
been set. T ...
Dolly Towing (Front-Wheel—Drive Vehicles)
To tow the vehicle from the front with the rear wheels on the ground, do the
following:
1. Put the front wheels on a dolly.
2. Move the shift lever to P (Park).
See Shifting Into Park.
3. ...