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:
Windshield Wipers
If the wiper motor overheats due to heavy snow or ice, the windshield wipers
will stop until the motor cools, and the wiper control is turned off. After removal
of the blockage, the wiper motor wi ...
Additional Required Services
The following services should be performed at the first maintenance service
(I or II) after the indicated
miles (kilometers) shown for each item.
Additional Required Services
Additional Require ...
Check Gages Warning Light
The check gages light
will come on briefly
when you are starting
the engine.
If the light comes on and stays on while you are
driving, check your coolant temperature and
engine oil pressure ...