See also:

Overdrive Operation
The automatic transmission includes an electronically controlled Overdrive (fourth and fifth gears). The transmission will automatically shift into the Overdrive gear if the following conditions ...

High Range (Four-Wheel Drive Models) Or Two-Wheel Drive Models
On This is the normal operating mode for ESC in 4WD HIGH range and in two-wheel drive vehicles. Whenever the vehicle is started or the transfer case (if equipped) is shifted from 4WD LOW range ...

Occupant Restraint Controller (ORC)
The ORC is part of a Federally regulated safety system required for this vehicle. The ORC determines if deployment of the front and/or side air bags in a frontal or side collision is required. B ...