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:
Engine Oil Additives/Engine
Oil Flushes
Do not add anything to the oil.
The recommended oils with the
dexos specification and displaying
the dexos certification mark are all
that is needed for good performance
and engine protection ...
Special Application Services
. Severe Commercial Use Vehicles Only: Lubricate chassis components every 5
000 km/3,000 mi.
- Have underbody flushing service performed once a year. ...
Pulling a Trailer
Here are some important points:
There are many different laws, including speed limit restrictions, having
to do with trailering. Make sure the rig will be legal, not only where you live
but ...