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:
Cruise Control Light
The cruise control light comes on whenever the cruise control is set.
The light goes out when the cruise control is turned off. See Cruise Control for more information. ...
Storage Compartments
Press the bottom of the load floor
handle assembly to lift the top on
the handle. Pull up on the handle
to open the cargo management
system.
See Cargo Management System
(Wagon Only) for m ...
Turn Signals When Towing a
Trailer
The arrows on the instrument panel
flash whenever signaling a turn or
lane change. Properly hooked up,
the trailer lamps also flash, telling
other drivers the vehicle is turning,
changing la ...