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Post Onsite · Air System
20931
In stock · ships from Knoxville
This is an air switch, a pneumatic control device commonly found in heavy-duty truck and trailer air systems.
Confirm the part fits before you buy. Applications and interchange numbers are researched and audited per part.
We don't publish fitment for this part yet. Rather than guess, get it confirmed against your truck in under a minute.
Air switches can serve as pressure sensors, safety shutoffs, or control valves that direct airflow to components like air seats, suspension leveling valves, or brake circuits. They are replaced when they leak, fail to maintain proper pressure, or exhibit intermittent operation. Without specific cross-reference documentation for part number 20931, the exact function remains unidentified, but these switches typically operate as dash-mounted controls for air suspension dump valves or auxiliary air supply.
Part Number: 20931
AIR SWITCH
Unit: ea
Dealer: Post Onsite
Compatibility, alternatives, and more
Parts commonly needed alongside air system
