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:
Approach Lighting
This feature allows you to select
whether or not to have the exterior
lights turn on briefly during low light
periods after unlocking the vehicle
using the Remote Keyless Entry
(RKE) or keyl ...
Instrument Panel, Leather,
Vinyl, and Other Plastic
Surfaces
Use a soft microfiber cloth
dampened with water to remove
dust and loose dirt. For a more
thorough cleaning, use a soft
microfiber cloth dampened with a
mild soap solution.
Notice: Soaking ...
General Towing Information
Only use towing equipment that has been designed for the vehicle. Contact your
dealer or trailering dealer for assistance with preparing the vehicle for towing
a trailer. See the following trailer ...