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:
Power Steering Fluid
See Engine Compartment Overview for reservoir location.
When to Check Power Steering Fluid
It is not necessary to regularly check power steering fluid unless a leak is
suspected in the syst ...
Manual Operation of Power Liftgate
To change the liftgate to manual operation, press OFF on the liftgate switch.
With the power liftgate disabled and all of the doors unlocked, the liftgate
can be manually opened and closed.
To ope ...
Safety Belt Care
Keep belts clean and dry.
WARNING
Do not bleach or dye safety belts. It may severely weaken them. In a crash, they
might not be able to provide adequate protection. Clean safety belts only wi ...