See also:

Compass Messages
CAL This message is displayed when the compass needs to be calibrated. See Compass. Three dashes will be displayed if the compass needs service. See your dealer for service. ...

Tips and Troubleshooting Chart
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Weight of the Trailer Tongue
The tongue load (A) of any trailer is very important because it is also part of the vehicle weight. The Gross Vehicle Weight (GVW) includes the curb weight of the vehicle, any cargo carried in it, ...