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:
Environmental Concerns
○ Always use established trails, roads, and areas that have been set aside for
public off-road recreational driving and obey all posted regulations.
○ Do not damage shrubs, flowers, tre ...
Fuses
The wiring circuits in the vehicle are protected from short circuits by fuses.
This greatly reduces the chance of damage caused by electrical problems.
Look at the silver-colored band inside the fu ...
Headlamps, Front Turn Signal, Sidemarker, and Parking Lamps
A. Low-Beam Headlamp
B. High-Beam Headlamp
C. Sidemarker Lamp
D. Park/Turn Signal Lamp
To replace one of these bulbs:
1. Turn the tire to reach the access port cap located in the front of wheel ...