Diagnostics
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, push 
, and an Advisor can run a check.
See also:
Vehicle Information Menu Items (with DIC Buttons)
(Vehicle Information): Press this button to scroll through the following menu items: ...
Steering Wheel Adjustment
Steering Wheel Adjustment
The tilt lever is located on the lower left side of the steering column.
To adjust the steering wheel:
1. Hold the steering wheel and pull the lever.
2. Move the stee ...
Body Component Lubrication
Lubricate all key lock cylinders, hood hinges, liftgate hinges, and the steel
fuel door hinge unless the components are plastic. Applying silicone grease on weatherstrips
with a clean cloth will m ...