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" width=19
height=17 id="_x0000_i1807" src="images/books/1183/10/index.2.gif" border=0>, and an
Advisor can run a check.
See also:
Checking Coolant in the
Intercooler System (CTS-V)
The vehicle must be on a level
surface when checking the
coolant level.
The super charged engine
intercooler coolant fill neck is
located in the engine compartment
on the passenger side of ...
When It Is Time for New Tires
Factors such as maintenance, temperatures, driving speeds, vehicle loading,
and road conditions affect the wear rate of the tires.
Treadwear indicators are one way to tell when it is time for ...
Keyless Unlock
If the vehicle has the keyless
access system, this feature allows
you to select which doors will
automatically unlock when you
approach the vehicle with the
keyless access transmitter and
...