RAM 1500 2017 Quick Reference Manual - page 13
2500/3500 AIR SUSPENSION SYSTEM
This air suspension system is a rear leveling ride height system. The
main purpose of this system is to maintain the truck’s rear ride height
level. There are two selectable heights that can be chosen based on
your operating conditions.
The system requires that the ignition be in ON/RUN position or the
engine running with zero vehicle speed for all user requested changes
and load leveling.
Normal Ride Height (NRH) – This is the standard position of the
suspension and is meant for normal driving. It will automatically adjust
to maintain the rear ride height as conditions change.
Alternate Trailer Height (ATH) – Lowers the vehicle approximately 1 in
(25 mm) for a level truck, to be used as required while trailer towing. It
will automatically adjust to maintain the rear ride height as conditions
change.
NOTE:
• Most 3500 models will not lower to Alternate Trailer Height (ATH)
when unloaded.
• Refer to “Trailer Towing” in “Starting And Operating” in your
Owner’s Manual at www.ramtrucks.com/en/owners/manuals/ further
information.
Ignition OFF Behavior
For a predetermined amount of time after the ignition is off the air
suspension may adjust to maintain a proper appearance.
Alternate Trailer Height Button
R A M 2 5 0 0 / 3 5 0 0