OnStar Vehicle Diagnostics can perform a vehicle check every month. It will check
the engine, transmission, antilock brakes, and other major vehicle systems. It also
checks the tire pressures, if the vehicle is equipped with the Tire Pressure Monitoring
System. If an On-Demand Diagnostics check is needed, press
, and an Advisor can run a check.
Connections
OnStar Additional InformationFuel Gauge
The fuel gauge indicates about how much fuel is left when the ignition is turned
to ON/RUN.
When the tank nears empty, the low fuel warning light will come on.
There is still a little fuel left, but the vehicle's fuel tank should be filled
soon. See Low Fuel Warning Light on page 5-20 ...
Parking
If the vehicle has a manual transmission, before getting out of the vehicle,
move the shift lever into R (Reverse) if parking on a downhill slope. On a level
surface or an uphill slope, use 1 (First) gear.
Firmly apply the parking brake. Turn the wheels toward the curb for a downhill
slope, o ...
Remote Keyless Entry (RKE) System
See Radio Frequency Statement on page 13-12.
If there is a decrease in the RKE operating range:
Check the distance. The transmitter may be too far from the vehicle.
Check the location. Other vehicles or objects may be blocking the signal.
Check the transmitter's battery.
See “Battery ...