See also:

Global Positioning System (GPS)
The navigation system determines the position of the vehicle by using satellite signals, various vehicle signals, and map data. At times, other interferences such as the satellite condition, road c ...

Weight of the Trailer Tongue
The tongue load (A) of any trailer is an important weight to measure because it affects the total gross weight of the vehicle. The Gross Vehicle Weight (GVW) includes the curb weight of the ...

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 ...