Wire/plug coming off my drum brake proportioning block? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

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Wire/plug coming off my drum brake proportioning block?

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03-15-2026, 04:30 AM	#2
Rust_never_sleeps Senior Member Join Date: Jun 2022 Location: San Ramon,CA Posts: 1,070	Re: Wire/plug coming off my drum brake proportioning block? It's the switch that trips the brake light on the gauge cluster when pressure in the front or back circuit drops and the differential pressure valve moves off center All combination valves have them top center, AFAIK __________________ 1970 C10 Custom longbed 350/350 “Carburetors are forgiving, timing is not” — Thunderhead289

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