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:
When to Check and Change Lubricant
It is not necessary to regularly check front axle fluid unless there is a leak
suspected or an unusual noise is heard. A fluid loss could indicate a problem. Have
it inspected and repaired. ...
DVD Distortion
Video distortion can occur when operating cellular phones, scanners, CB radios,
Global Positioning Systems (GPS)*, two-way radios, mobile fax machines, or walkie
talkies.
It might be necessary to ...
Bulb Replacement
For the proper type of replacement bulbs, see Replacement Bulbs.
For any bulb changing procedure not listed in this section, contact your
dealer. ...