Hello everyone, I have a C7500 here that had problems with it looking power steering assist when braking and turning at the same time. Replaced ps pump and that solved that issue. The hydra-boost unit was leaking so I advised to repair as well. I ordered a reman unit and installed after putting everything together the vehicle has a hard pedal. It feels like there is no boost. I decided to try another reman unit but had the same result. Is there anything I'm overlooking? It has the electric motor on the bottom of the boost unit. I have taken this apart many times hoping I would catch something I did wrong. Thanks for the help!!
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2001 GMC C7500 Topkick C7H042 8.1L