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 the Change Engine Oil Soon
Message Displays
Change engine oil and filter. See Engine Oil. An Emission Control Service.
When the Change Engine Oil Soon message displays,
service is required for the vehicle as soon as possible,
within the ne ...
Exterior Lighting
The exterior lamp control is located
on the instrument panel on the
outboard side of the steering wheel.
Turn the control to the following
positions:
: Turns off the exterior lamps.
The kn ...
Owner Checks and Services
At Each Fuel Stop
Check the engine oil level. See Engine Oil .
Once a Month
Check the tire inflation pressures. See Tire Pressure .
Inspect the tires for wear. See Tire Inspection .
Che ...