[look 171]

Originally Posted by Alan A

It’s pretty simple if you understand brakes.
The hydro boost replaces the servo.

I was looking for a picture but post 2 is likely your issue.
https://www.classicwinnebagos.com/forum/index.php?topic=9126.50

Updated pump (Higher flow) will probably fix it.

I am thinking now I need a power steering cooler. There's not one in the truck.

That's a lot of info. Much to learn and understand. After reading, I really don't think its the steering box.


Is there a test performed to find out if the pump is the real issue? I need to take this to someone else. These guys know Duramax engines, not I am questioning their knowledge on brake systems. Thanks for the tip. Off the read more.