The springs are broken or sagging (RWD).

Replace the springs. Refer to Front Coil Springs Replacement in Front Suspension.

The torsion bars are sagging (F4WD).

Adjust the torsion bars. Refer to Torsion Bar Replacement in Front Suspension.

The vehicle is overloaded or improperly loaded.

Avoid overloading the vehicle. Refer to Vehicle Certification Label in General Information.