See also:

Six-Speed Automatic Transmission (5.7L Engine) — If Equipped
The shift lever position display (located in the instrument panel cluster) indicates the transmission gear range. You must press the brake pedal to move the shift lever out of the PARK position ...

Key Ignition Park Interlock
This vehicle is equipped with a Key Ignition Park Interlock which requires the shift lever to be placed in PARK before the ignition switch can be turned to the LOCK/ OFF position. The key can on ...

Shifting Procedures
4WD HI To 4WD LOW With the vehicle at speeds of 0 to 3 mph (0 to 5 km/h), the ignition switch in the ON position or the engine running, shift the transmission into NEUTRAL, and press the “4WD ...