While climbing a grade

When driving up a hill, undesired upshift to 4th gear is prevented from taking place when the accelerator is released. This minimizes the chance of subsequent downshifting to a lower gear when accelerating again. This prevents repeated upshifting and downshifting resulting in a smoother operation of the vehicle.

NOTE
The transmission may downshift to 2nd or 1st gear, depending on the way the accelerator pedal is depressed to accelerate the vehicle again.

    See also:

    Adverse safety consequences of overloading on handling and stopping and on tires
    Overloading could affect vehicle handling, stopping distance, and vehicle and tire performance in the following ways. This could lead to an accident and possibly result in severe personal injury. • V ...

    Adverse safety consequences of overloading on handling and stopping and on tires
    Overloading could affect vehicle handling, stopping distance, vehicle and tire as shown in the following. This could lead to an accident and possibly result in severe personal injury. ● Veh ...

    Front fog light indicator light (if equipped)
    This indicator light illuminates while the front fog lights are illuminated. ...