Shop ABS valves and modulator valves for heavy-duty trucks at All Pro Truck Parts. ABS modulator valves are the actuators in the anti-lock braking system — they release and reapply brake pressure during ABS events to prevent wheel lock-up. A failed modulator can cause ABS warning lights, dragging brakes, or full ABS system shutdown. We carry replacement ABS valves and modulators for the most common Class 6 through Class 8 truck and trailer platforms.
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