OnStar®
Keys and LocksEngine Heater
The engine heater can provide easier starting and better fuel economy during
engine warm-up in cold weather conditions at or below -18°C (0°F). Vehicles with
an engine heater should be plugged in at least four hours before starting.
Turn off the engine.
Open the hood and unwrap the ...
Exit Lighting
If the dome lamps are in the DOOR position, they come on automatically when the
key is removed from the ignition. The exterior lamps and dome lamps remain on after
the door is closed for a set amount of time, then automatically turn off.
The headlamps, parking lamps, and back-up lamps will turn ...
TPMS Malfunction Light
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 warning light
flashes for about one minute and then stays on for the remainder of the ignition
cycle. The malfunction light comes on at each ign ...