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03-23-2012, 09:46 AM
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#1 |
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Registered User
Join Date: Mar 2012
Location: Ok , ok
Posts: 2
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1976 GMC Sierra PU
What is this box on my pickup between master cylinder and brakes? I can't find it in the parts list, and nobody seems to be able to tell me anything about it? Thanks for any help.
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03-23-2012, 11:52 AM
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#2 |
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Registered User
Join Date: May 2009
Location: Motor City
Posts: 9,226
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Re: 1976 GMC Sierra PU
Got a pic?
K
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Chevrolet Flint Assembly 1979-1986 GM Full Size Truck Engineering 1986 - 2019 Intro from an Old Assembly Guy: http://67-72chevytrucks.com/vboard/s...d.php?t=342926 My Pontiac story: http://forums.maxperformanceinc.com/...d.php?t=560524 Chevelle intro: http://www.superchevy.com/features/s...hevy-chevelle/ |
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03-23-2012, 02:01 PM
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#3 |
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Just here to tinker
 
Join Date: Jun 2008
Location: Holland, MI
Posts: 3,697
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Re: 1976 GMC Sierra PU
If you are talking about a box that your brake lines go to, you may be taking about the proportioning valve.
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03-23-2012, 02:07 PM
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#4 |
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Registered User
Join Date: May 2009
Location: Motor City
Posts: 9,226
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Re: 1976 GMC Sierra PU
My first thought as well - or it could be an aftermarket trailer brake controller.
It'll be interesting to see. K
__________________
Chevrolet Flint Assembly 1979-1986 GM Full Size Truck Engineering 1986 - 2019 Intro from an Old Assembly Guy: http://67-72chevytrucks.com/vboard/s...d.php?t=342926 My Pontiac story: http://forums.maxperformanceinc.com/...d.php?t=560524 Chevelle intro: http://www.superchevy.com/features/s...hevy-chevelle/ |
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03-23-2012, 04:39 PM
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#5 |
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Registered User
Join Date: Oct 2003
Location: houston, texas
Posts: 1,974
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Re: 1976 GMC Sierra PU
on a 76 proportioning valve is mounted on the frame from factory
we need a picture
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2008 Silverado Z71 RCSB 1991 GMC Jimmy 4x4 1976 GMC Sierra C15 SWB |
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03-23-2012, 09:32 PM
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#6 |
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Registered User
Join Date: Sep 2009
Location: Beaverton, OR from WA State
Posts: 1,515
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Re: 1976 GMC Sierra PU
I wonder if it's part of an old school hydraulic trailer brake controller.
Yep, we'll need a pic.
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Devin 1983 GMC High Sierra 2500, 4x4, RC/LB, 400 S.B., SM-465, NP-208, Corporate 10 bolt & 9.5" 14 bolt 1996 GMC Sierra SLE 3500 DRW, 4x4, EC/LB, Vortec 454, NV-4500, BW-4401, AAM 925 & AAM 1050 1997 GMC Sierra SLT 1500 4x4, Z71/F44, EC/SB, Vortec 350 My Introduction with my '83s History New Daily, the '96 |
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03-25-2012, 09:10 AM
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#7 |
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Registered User
Join Date: Mar 2012
Location: Ok , ok
Posts: 2
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Re: 1976 GMC Sierra PU
Thanks a lot everyone. As it turns out, it is a proportioning valve. I have already located an aftermarket part on ebay. It makes a big difference when you know what to ask for! The old Jimmy will be back on the road soon!
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03-25-2012, 01:52 PM
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#8 | |
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Registered User
Join Date: Oct 2003
Location: houston, texas
Posts: 1,974
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Re: 1976 GMC Sierra PU
Quote:
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2008 Silverado Z71 RCSB 1991 GMC Jimmy 4x4 1976 GMC Sierra C15 SWB |
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