Mine is out of an 06 3/4 ton silverado HD
Mine is out of an 06 3/4 ton silverado HD
You probably have a hydraboost pump then. Check and see if your PS pump has three lines coming out of it. If it does, then it is indeed a hydraboost pump and you'll need to have a hydraboost master cylinder to make it all work.
If it has 2 lines coming out of the PS pump, then you're all good to go. Just route the two lines to the steering box on your OBS and it'll fit in like the old one.
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Finally went and looked at it today, it does in fact have 3 lines on it.
So you are saying that I will need to swap to a master cylinder from one of the newer trucks?
I am guessing one of the lines is a vacuum line?
Is the master cylinder a direct replacement for the factory 1990 one?