Tachometer

The tachometer displays the engine speed in revolutions per minute (rpm).

    See also:

    Speedometer
    The speedometer shows the vehicle's speed in either kilometers per hour (km/h) or miles per hour (mph). ...

    Driving Impressions
    The overriding thing that struck me was how small the Acadia feels when you drive it. Make no mistake, this is a big vehicle, but it doesn't feel that way, and that's a good thing. It's easy to ju ...

    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 vehic ...