The electronically controlled air suspension, if equipped, keeps the rear of your vehicle level as you load and unload it. The system includes a compressor, two height sensor and two air springs supporting the vehicle.

The engine must be running for the system to operate and level the vehicle after loading or unloading. The system will suspend leveling if any of the doors and/or the liftgate are open. Once the doors are closed, system leveling will continue.

You may hear the compressor running when you load your vehicle, and periodically as the system adjusts the vehicle to the standard ride height. You may also hear the release of air similar to a hissing sound during suspension operation. This is normal.

Load leveling will not function normally with the inflator hose attached to the inflator outlet. Remove the inflater hose from the outlet when it is not in use. See Accessory Inflator .

Overload protection is designed to protect the air suspension system and is an indication to the driver that the vehicle is overloaded.

If the rear suspension remains at a low height, the rear axle load has exceeded GAWR (Gross Axle Weight Rating). When the overload protection mode is activated, the compressor operates for about 30 seconds to one minute without raising the vehicle depending on the amount of overload. This will continue each time the ignition is turned on until the rear axle load is reduced below GAWR.

If the total rear GAWR (Gross Axle Weight Rating) is reached, the suspension may be slightly less than level. This is normal and does not mean there is a problem with the air suspension.

If the system overheats, it will shut down and stop all leveling functions until the system cools down. During this time the SERVICE AIR SUSPENSION message will appear in the DIC. See Driver Information Center (DIC) for more information.