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 vehicle is equipped with the Tire Pressure Monitoring
System. If a diagnostics check is needed between e-mails, press
, and an Advisor can run a check.
Connections
OnStar Additional InformationTire Sidewall Labeling
Useful information about a tire is molded into its sidewall. The examples show
a typical passenger vehicle tire and a compact spare tire sidewall.
Passenger (P-Metric) Tire Example
(1) Tire Size: The tire size is a combination of letters and numbers used
to define a particular tire's wid ...
Remote Vehicle Start
For vehicles with this feature, the engine can be started from outside the vehicle.
Starting the Vehicle
1. Aim the RKE transmitter at the vehicle.
2. Press and release .
3. Immediately after completing Step 2, press and hold
for at least two seconds or until the
turn signal lamps flash.
Wh ...
Taillamps, Turn Signal, Sidemarker, Stoplamps, and Back-Up Lamps
Trunk Deck Inboard Taillamps
1. Open the trunk.
2. Remove the trunk deck trim cover (1).
3. Remove the bulb socket (2) by turning counterclockwise and pulling straight out.
4. Remove the bulb from the socket.
5. Install the new bulb in the bulb socket.
6. Install the bulb socket by turni ...