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:
Leaving the Vehicle with the Engine Running
WARNING
It can be dangerous to leave the vehicle with the engine running.
The vehicle could move suddenly if the shift lever is not fully in P (Park)
with the parking brake firmly set. And, if you ...
Manual Mode
Driver Shift Control (DSC)
Notice: Driving with the engine at a high rpm without upshifting while
using Driver Shift Control (DSC), could damage the vehicle.
Always upshift when necessary while u ...
Air Quality Sensor
This will allow you to select whether the system will operate at high or low
sensitivity. Only vehicles with the dual zone climate control will have this
option.
Press the MENU/SELECT knob when A ...