See also:

Reading Lamps
There are reading lamps located on the overhead console and over the rear passenger doors. These lamps come on automatically when any door is opened. To manually turn the reading lamps on or off: ...

Coverage
Services are provided up to 5 years/ 160 000 km (100,000 mi), whichever comes first. In the U.S., anyone driving the vehicle is covered. In Canada, a person driving the vehicle without permission ...

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 ...