1978-86 Chevy Blazer/GMC Jimmy Full Size Front Disc/Rear Drums Proportioning Valve
Works on all 1978-86 Chevy and GMC full size Blazers/Jimmys that have front disc brakes and drum rear brakes.
Works on2 and 4 wheel drive
 Our Proportion Valve comes with a 1 year warranty.
 For use on Disc/Drum Setup Only
 

Our brake proportioning valve has a 9/16"-18 connection for Rear Brakes & Dual 3/8"-24 ports for the front brakes.
The connections from the Master Cylinder are 1/2"-20 and 7/16"-24.
This valve comes with a 1 year warranty.
We also offer a pigtail for the prop valve wire sensor and a prop valve bleeding tool in the related items section of this page.

If you drive a Chevrolet or GMC full-size Blazer/Jimmy from model years 1978 - 1986 then this is the correct brake proportioning valve for your front disc and rear drum brakes. This part works on full-size Chevy and GM Blazers/Jimmys 2-wheel drive or a 4-wheel drive.

Fits the following Blazer/Jimmy models:

• 1978 Full-Size Chevrolet Blazer
• 1979 Full-Size Chevrolet Blazer
• 1980 Full-Size Chevrolet Blazer
• 1981 Full-Size Chevrolet Blazer
• 1982 Full Size Chevrolet Blazer
• 1983 Full-Size Chevrolet Blazer
• 1984 Full Size Chevrolet Blazer
• 1985 Full-Size Chevrolet Blazer
• 1986 Full Size Chevrolet Blazer
• 1987 Full-Size Chevrolet Blazer
• 1978 Full-Size GMC Jimmy
• 1979 Full-Size GMC Jimmy
• 1980 Full-Size GMC Jimmy
• 1981 Full-Size GMC Jimmy
• 1982 Full Size GMC Jimmy
• 1983 Full-Size GMC Jimmy
• 1984 Full Size GMC Jimmy
• 1985 Full-Size GMC Jimmy
• 1986 Full Size GMC Jimmy

This part is designed to fit the following vehicles.

Average based on 9 reviews

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Perfect fit

Review by Sam from , on 10/31/2024

I searched everywhere for a stock replacement Proportioning Valve It’s a discontinued part even from Chevrolet! I had just installed new stainless brake lines so I needed an exact replacement The part fit perfectly

C10 Proportioning valve

Review by Wayne from , on 5/4/2019

Direct quality replacement of OEM part.

1975 K5 Blazer

Review by Joe from , on 2/15/2018

I could not find this anywhere.... only offers to rebuild old cast one... I could of bought a new one and change all hard lines but didn’t want to do that if possible. As advertised this brake proportioning valve was a exact match up to all lines, mounting holes and threads.... And was even made with higher quality caseing....Installed in 30 minutes. Very Happy!

Blazer Combination valve

Review by Tom Smith from , on 2/19/2017

The old cast iron valve began leaking. Got the new brass valve from Carolina Classic. Works great!

prop valve -85 k20

Review by J Mack Wilson from , on 12/16/2016

valve worked perfectly ,now have rear brakes . prompt tech support !

Proportioning valve

Review by Gil James from , on 10/25/2016

This valve replaces the original without any modifications. This makes it an easier direct fit replacement. Thanks for the fast shipping.

perfect hard to find part.

Review by Richard L. from Munford , TN on 12/30/2015

This is no loner available anywhere. Carolina came through perfectly. Great product and amazing customer service.

Good Replacement Proportioning Valve for K-5 Blazers

Review by Mario Costaldi from Fayetteville, Arkansas on 8/27/2015

Needed to get a new valve for the old K-5 and had no luck in NW Arkansas. For some odd reason O' Reilly's, Autozone or Advanced Auto Parts do not think that a truck owner may need one of these when they go bad. Got the "You could try Craig's List"...Haaaa All I can say is thank you Carolina Classic Trucks for bailing this guy out. The new valve was a perfect OEM fit.

73-86 Chevy/GMC Full Size Blazer/Jimmy Front Disc/ Rear Drums Proportioning Valve

Review by chuck from west springfield, ma. on 11/6/2014

I was very pleased with quality of prop valve ,worked just like OEM.