OnStar Services

See also:

Starting Procedure (Key Access)
1. With your foot off the accelerator pedal, turn the ignition key to START. When the engine starts, let go of the ignition. The idle speed will go down as your engine gets warm. Do not rac ...

Volume Control
VOL/ (Volume/Power): Turn to adjust the volume. (Phone/Mute): For vehicles with OnStar®, press and hold to mute the infotainment system. Press and hold again, or turn the VOL/ knob t ...

TPMS Malfunction Light and Message
The TPMS will not function properly if one or more of the TPMS sensors are missing or inoperable. When the system detects a malfunction, the low tire pressure warning light, defined above, flashes ...