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 
, and an
Advisor can run a check.
See also:
Belts
• Belts may need replacing if they
squeak or show signs of
cracking or splitting.
• Trained dealer technicians
can inspect the belts and
recommend replacement when
necessary. ...
Head Restraint Removal and
Reinstallation
The rear outboard head restraints
can be removed if they interfere with
the proper installation of the child
restraint.
To remove the head restraint:
1. Partially fold the seatback
forward. ...
SERVICE BATTERY CHARGING SYSTEM
This message is displayed when
there is a fault in the battery
charging system. Take the vehicle to
your dealer for service. ...