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:
Headlamp Washer
For vehicles with headlamp washers
they clear debris from the headlamp
lenses.
The headlamp washers are beneath
the headlamps.
Press the washer button at the end
of the windshield wiper le ...
Engine Oil Change
When the CHANGE ENGINE OIL SOON message displays, have the engine oil and filter
changed within the next 1 000 km/600 mi. If driven under the best conditions, the
engine oil life system might not ...
Driving on Wet Roads
Rain and wet roads can reduce
vehicle traction and affect your
ability to stop and accelerate.
Always drive slower in these types
of driving conditions and avoid
driving through large puddles ...