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:
Headlamps
The exterior lamps
knob is located on your
instrument panel to
the left of the steering
wheel.
(Off): Turn the knob to
this symbol and
release it to turn off the Daytime Running Lamps
(DRL ...
Vehicle Care
To help keep the vehicle looking like
new, vehicle care products are
available from your dealer. For
information on how to clean and
protect the vehicle’s interior and
exterior, see Interi ...
Trailer Towing
Before pulling a trailer, there are three important considerations that have
to do with weight:
The weight of the trailer.
The weight of the trailer tongue.
The total weight on your vehicle& ...