OnStar Vehicle Diagnostics can perform a vehicle check every month. It will check
the engine, transmission, antilock brakes, and other major vehicle systems. It also
checks the tire pressures, if the vehicle is equipped with the Tire Pressure Monitoring
System. If an On-Demand Diagnostics check is needed, press
, and an Advisor can run a check.
Connections
OnStar Additional InformationRadio Controls without Touchscreen
The infotainment system is operated by using the pushbuttons, multifunction knobs,
and menus shown on the display.
Turning the System On or Off
/VOL (Power/Volume): Press to turn
the radio on and off.
Automatic Switch-Off
If the infotainment system has been turned on after the ignition is tu ...
Uniform Tire Quality Grading
The following information relates to the system developed by the United States
National Highway Traffic Safety Administration (NHTSA), which grades tires by treadwear,
traction, and temperature performance. This applies only to vehicles sold in the
United States. The grades are molded on the s ...
Accessories and Modifications
Adding non-dealer accessories or making modifications to the vehicle can affect
vehicle performance and safety, including such things as airbags, braking, stability,
ride and handling, emissions systems, aerodynamics, durability, and electronic systems
like antilock brakes, traction control, a ...