If your vehicle has this feature, you'll find a label on the headliner above the windshield or in another place near the driver that shows how to use it.
Automatic Transmission
The switch is located on the instrument panel to the right of the climate controls.
When the switch is up, the rear axle is in the high range. Push it down to get the low range.
The two-speed axle should be in low range when you park the vehicle. Apply the parking brake, shift to PARK (P) or NEUTRAL (N) and shut off the engine.
To operate off-road or under a heavy load, shift into low range when the vehicle is standing still and then operate the transmission normally.
On the highway, with the rear axle in low range and the transmission in top gear, you may shift the rear axle to high range by raising the switch and releasing the accelerator momentarily. Reapply the accelerator after you shift.
Under light load conditions, first shift the rear axle into the high range with the vehicle at a standstill and then operate the transmission normally.
Air Suspension
Your vehicle may have air suspension which is designed for a single-axle on-highway use.
Rear Air Suspension Dump Control
If your vehicle is equipped with single-axle air suspension, you may have this control. The air suspension dump control allows the operator to lower the deck height approximately 4.5 inches (11.5 cm) from the normal frame height.
The switch to deflate and inflate the air suspension is located in the instrument panel switchbank.
Press the bottom of the switch to deflate the air suspension and lower the deck height. Press the top of the switch to return the suspension to normal deck height.
An indicator light will come on and stay on whenever the switch is in the dumped position.
