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:
Obstacle Detection Features
If the liftgate encounters an obstacle
during a power open or close cycle,
a warning chime will sound and the
liftgate will automatically reverse
direction to the full closed or
open positio ...
All-Wheel Drive
If your vehicle is equipped with
all-wheel-drive, this is an additional
system that needs lubrication.
Transfer Case
When to Check Lubricant
It is not necessary to regularly
check the transfe ...
Cruise Control
WARNING
Cruise control can be dangerous where you cannot drive safely at a steady speed.
So, do not use the cruise control on winding roads or in heavy traffic.
Cruise control can be dangerou ...