Chevy G20 Brake Combo Valve
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Always room for one more
Joined: Oct 2011
Posts: 8,960
From: Georgia
Chevy G20 Brake Combo Valve
Hi everyone.
I'm working on my 1990 Chevy G20 van doing brakes. I believe one of the rear cylinders was leaking, which drained the reservoir dry, and the valve in the proportioning valve migrated to shut off the system. After replacing both cylinders I get nada when bleeding. The fronts are fine.
I can find nothing in google or YouTube that specifically talks about the G20 van. It's always Chevy trucks "they're all the same." They are not.
My prop valve has two lines from the Master going into the top, It has various lines going to the wheels and also another block next to it. A couple lines from the other block go out to the wheels.
Which block has the meter? The one block(which is inboard) has plugs on both ends and they come off with a six point wrench/socket. The outboard block has a plug in the front and a line coming out of the back.
My stellar Haynes manual tells me how to remove and replace it, in about one paragraph.
Anyone have one of these vans and have messed with this? Which is actually the prop valve and what is the other block? How will it reset? Thanks everyone.
I'm working on my 1990 Chevy G20 van doing brakes. I believe one of the rear cylinders was leaking, which drained the reservoir dry, and the valve in the proportioning valve migrated to shut off the system. After replacing both cylinders I get nada when bleeding. The fronts are fine.
I can find nothing in google or YouTube that specifically talks about the G20 van. It's always Chevy trucks "they're all the same." They are not.
My prop valve has two lines from the Master going into the top, It has various lines going to the wheels and also another block next to it. A couple lines from the other block go out to the wheels.
Which block has the meter? The one block(which is inboard) has plugs on both ends and they come off with a six point wrench/socket. The outboard block has a plug in the front and a line coming out of the back.
My stellar Haynes manual tells me how to remove and replace it, in about one paragraph.
Anyone have one of these vans and have messed with this? Which is actually the prop valve and what is the other block? How will it reset? Thanks everyone.
Last edited by slantflat; Jul 23, 2019 at 04:29 PM.
Old School Olds
Joined: Nov 2008
Posts: 9,271
From: Marble Falls TX
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