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 InformationBrake Fluid
The brake/clutch master cylinder
reservoir is filled with DOT 4 brake fluid as indicated on the reservoir cap. See
Engine Compartment Overview on page 10-7 for the location of the reservoir.
There are only two reasons why the brake fluid level in the reservoir might go
down:
The brake fl ...
Taillamps, Turn Signal, Stoplamps, and Back-Up Lamps
Stoplamp/Taillamp
Turn Signal Lamp/Taillamp
Back-up Lamp
To replace a taillamp, turn signal lamp, stoplamp, or back-up bulb:
Open the liftgate. See Liftgate on page 2-8.
Remove the two screws and the lamp assembly.
Turn the bulb socket counterclockwise and remove the so ...
Passenger Sensing System
The vehicle has a passenger sensing system for the front outboard passenger position.
The passenger airbag status indicator will light on the center display when the
vehicle is started.
United States
Canada
The words ON and OFF, or the symbol for on and off, will be visible during the ...