1978-87 Chevy Truck Front Disc/Rear Drums Proportioning Valve
Works on all 1978-87 Chevy and GMC full size trucks that have front disc brakes and drum rear brakes.
Works on half ton through one ton, 2 and 4 wheel drive
Our Proportion Valve comes with a 1 year warranty.
For use on Disc/Drum Setup Only

Disc/Drum Proportion Valve

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 truck from model years 1981 - 1987, 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 trucks from half ton through one ton, whether it's a 2-wheel drive or a 4-wheel drive. If you've got GMC or Chevy brake proportioning valve problems, this part will help fix the following vehicles:

1981 Full-Size Chevrolet Truck
1982 Full Size Chevrolet Truck
1983 Full-Size Chevrolet Truck
1984 Full Size Chevrolet Truck
1985 Full-Size Chevrolet Truck
1986 Full Size Chevrolet Truck
1987 Full-Size Chevrolet Truck
1981 Full-Size GMC Truck
1982 Full Size GMC Truck
1983 Full-Size GMC Truck
1984 Full Size GMC Truck
1985 Full-Size GMC Truck
1986 Full Size GMC Truck
1987 Full-Size GMC Truck

Vehicle Applications

This part is designed to fit the following vehicles.

Chevy Truck 1978
Chevy Truck 1979
Chevy Truck 1980
Chevy Truck 1981
Chevy Truck 1982
Chevy Truck 1983
Chevy Truck 1984
Chevy Truck 1985
Chevy Truck 1986
Chevy Truck 1987
GMC Truck 1978
GMC Truck 1979
GMC Truck 1980
GMC Truck 1981
GMC Truck 1982
GMC Truck 1983
GMC Truck 1984
GMC Truck 1985
GMC Truck 1986
GMC Truck 1987

Warranty Information

1 year

Customer Reviews

Average 5 out of 5 based on 33 reviews

Write an online review and share your thoughts with others.

Perfect Fit

Review by George Peele from , on 2/16/2019

Was concerned about the fit on a 40 year old truck at first. Not anymore.Everything fitted and worked perfect. Good job fellas !!

Proportioning valve for Chevy truck

Review by William Dean from , on 12/16/2018

Perfect fit and works great. No problems at all.

Brakes

Review by Robert Gordon from , on 11/26/2018

The proportional valve that I received for the brakes on my 1981 Chevy pick up save the day now I can’t stop while I am pulling a boat.

Dave's Review

Review by David Mood from , on 11/20/2018

This valve was just like the original. Perfect

Great match

Review by scott herrling from , on 7/20/2018

For a 32 year old truck, this part was a identical match, and that was very nice.

rare part, export to Germany

Review by Andreas from , on 3/14/2018

I am glad I found carolina classic trucks - the break part for my 1984 CUCV Blazer can´t be found in Germany. Unfortunately, you don´t ship to Germany - but I have friends in the USA who received your shipment and sent it off to me.. thanks!

Chevy Brake Proportioning Valve

Review by Liz from , on 2/19/2018

I got this for my 88 chevy V20 silverado suburban. Fit perfectly, and the brakes are amazing. The original one was not working, then it started leaking. So happy with this purchase.

excellent

Review by Melton from , on 2/5/2018

This proportioning valve was and exact replacement, no modifications were required.

Perfect fit and works well

Review by Dave from , on 1/9/2018

I searched locally and could not find anything OEM or even aftermarket. Installed exactly the same as original and works great.