Air suspension pump leaking?

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New Member
May 30, 2019
Truck Year
Hi everyone new ecodiesel owner here(2015) Been doing my research and learning about the features and maintenance but one recent thing I noticed has caught my attention and I can’t seem to find any information about diagnosing air suspension. Maybe I didn’t notice it at first but I really didn’t hear the compressor running all that much but now it runs quite often. When set to entry mode and engine running the pump cycles on and off for a few seconds and back on and keeps cycling all while the rear moves up and down slightly. When set to other height modes the truck stays at the level but the pump shuts off for about 30 seconds and kicks on again and keeps cycling. One would assume there’s a leak... when engine is off the pump is off and no leak can be heard or found and the truck maintains its level(tested overnight) it’s also very slow to raise Sometimes or just stubborn in general and I have to set it to a lower mode and then back up and I will usually be stuck with a raising indicator for several minutes even though nothing is happening. I have let the truck run and pump up and then once the pump shuts off I immediately shut the truck off and check for leaks and I have noticed in the area around the pump occasionally I catch a significant hissing that sounds like there’s a good amount of moisture in the airflow. This system is all new to me and with work all day and work all night I unfortunately don’t have the time to jack it up and soap up everything and check the entire system as much as I would love to fully understand the functions and layout of the entire system. Any ideas on possible leaks or is it common for frequent pump running?