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 InformationTire Pressure
Tires need the correct amount of air pressure to operate effectively.
Caution
Neither tire underinflation nor overinflation is good.
Underinflated tires, or tires that do not have enough air, can result in:
Tire overloading and overheating which could lead to a blowout.
Premature or irregul ...
Engine Oil
To ensure proper engine performance and long life, careful attention must be
paid to engine oil.
Following these simple, but important steps will help protect your investment:
Always use engine oil approved to the proper specification and of the proper
viscosity grade. See “Selecting the R ...
Floor Mats
Warning
If a floor mat is the wrong size or is not properly installed,
it can interfere with the pedals.
Interference with the pedals can cause unintended acceleration and/or increased
stopping distance which can cause a crash and injury. Make sure the floor mat does
not interfere with the p ...