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 InformationMalfunction Indicator Lamp
A computer system called OBD II (On-Board Diagnostics-Second Generation) monitors
the operation of the vehicle to ensure emissions are at acceptable levels, helping
to maintain a clean environment. The malfunction indicator lamp comes on when the
vehicle is placed in ON/RUN, as a check to show ...
Torque Lock (Automatic Transmission)
If you are parking on a hill and you do not shift the transmission into P (Park)
properly, the weight of the vehicle may put too much force on the parking pawl in
the transmission. You may find it difficult to pull the shift lever out of P (Park).
This is called “torque lock.” To prevent torque ...
OnStar Overview
Voice Command Button
Blue OnStar Button
Emergency Button
This vehicle may be equipped with a comprehensive, in-vehicle system that can
connect to a live OnStar Advisor for Emergency, Security, Navigation, Connection,
and Diagnostic Services. OnStar services may require a paid subscripti ...