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 InformationTail Lamp Replacement
Preliminary Procedures
Open and support the rear compartment
lid.
Remove the body side trim panel replacement in order to expose the tail
lamp pocket nuts. Refer to Body Side Trim Panel
Replacement - Left Side.
Tail Lamp Bolt (Qty: 2)
Caution: Refer to Fastener Caut ...
Brake System Warning Light
The vehicle brake system consists of two hydraulic circuits. If one circuit is
not working, the remaining circuit can still work to stop the vehicle. For normal
braking performance, both circuits need to be working.
If the warning light comes on, there is a brake problem. Have the brake system ...
Checking and Adding Power Steering Fluid
Caution: When adding fluid or making a complete fluid change, always
use the proper power steering fluid. Failure to use the proper fluid
will cause hose and seal damage and fluid leaks.
Clean the area surrounding the reservoir cap.
Remove the reservoir cap.
Inspect the power steeri ...