See also:

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 ...

Starting the Engine
If the vehicle is a hybrid, see the hybrid supplement for more information. Move the shift lever to P (Park) or N (Neutral). The engine will not start in any other position. To restart the engine w ...

New Vehicle Break-In
Notice: The vehicle does not need an elaborate break-in. But it will perform better in the long run if you follow these guidelines: - Do not drive at any one constant speed, fast or slow, for the fi ...