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:
EPB Apply
The EPB can be applied any time the vehicle is stopped. The EPB is applied
by momentarily lifting up on the EPB switch. Once fully applied, the parking
brake status light will be on. While the brake ...
Tire Pressure
Tires need the correct amount of air pressure to operate effectively.
Notice: Neither tire underinflation nor overinflation is good.
Underinflated tires, or tires that do not have enough air, can ...
Inserting a CD
(Six-Disc CD Player)
(Load): Press to load CDs into
the CD player. This CD player holds
up to six CDs.
To insert one CD:
1. Press and release .
2. Wait for the message to insert
the disc.
3. Load a CD. Insert t ...