Coolant Fluid Level Switch 4903489 – Compatible With Mack, Volvo, GMC, Peterbilt, Kenworth Trucks

If your truck's coolant light is acting up or you're losing fluid without a visible leak, the sensor might be the issue.

This guardian coolant level switch, part number 4903489, fits a wide range of heavy-duty trucks including Mack, Volvo, GMC, Peterbilt, and Kenworth.

It's a direct replacement—just unplug the old one and pop this in.

Interchanges with 01-530-1204, 068598, 3612521, and more.

Brand new, non-universal, made for these applications.

Keep your cooling system monitored and your engine safe.