See also:

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 v ...

Head Restraint Removal and Reinstallation
The rear outboard head restraints can be removed if they interfere with the proper installation of the child restraint. To remove the head restraint: 1. Partially fold the seatback forward. See Re ...

How OnStar Service Works
Push this blue button to connect to a specially trained OnStar Advisor to verify your account information and to answer questions. Push this red emergency button to get priority help from specially ...