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 the v ...

Tachometer
The tachometer displays the engine speed in revolutions per minute (rpm). Notice: If the engine is operated with the tachometer in the shaded warning area, the vehicle could be damaged, and the dam ...

Safety Chains
Always attach chains between the vehicle and the trailer. Cross the safety chains under the tongue of the trailer to help prevent the tongue from contacting the road if it becomes separated from t ...