This is a new in the box disc drum proportioning valve for 78-88 GM cars.
This is the GM Proportional Valve used on all GM cars and trucks from 78-86. It has the plastic switch that is in the top of the Prop. Valve of all 78-86 GM cars. Your brake warning light lead plugs in and if there is a loss of pressure a warning light in the dash will be on. We welcome your questions
what you see in the photo is what you get.
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