Salto_jorge

What is HydroBoost ?

How can HydroBoost (what ever it is) have anything to do with the High pressure power steering hose ?

HydroBoost vs Conventional Power System.

Have seen hoses listed as "Pump To Hydroboost" and "Hydroboost To Gear".

How do you know if you have a Hydroboost ?

Is the return just a rubber tube or does it have special metal ends attached to it ?

Oh well, always something for me to learn.
At least my 03 Envoy and 09 Aveo have regular steering !

canucklehead

Notice how your brake master cylinder has no vacuum diaphram?
That's because your power steering system is supplying the power.
The power boost lines are the metal ones that curl around down to the pump, and yes they always leak. I have found that the Lucas brand power steering repair fluid is so thick that it has reduced the weeping of fluid from my lines, and they were replaced about 40000 kms ago.

Salto_jorge

My 2001 Express LT 1500 has a large vacuum booster on the drivers side that the brake fluid reservoir bolts against.

cleveland63b

in a nut shell hydroboost uses the power steering pump and fluid for brake assist instead of the vacuum booster using vacuum for assist. If that answered your question?

canucklehead

Well. I guess that is because its a half ton. My 2002 3/4 ton has the hydroboost system. No vacuum diaphram.
I'm not sure when things changed over.

Salto_jorge

This is what the booster on my 2001 looks like, excuse the large images from my Cell.

Salto_jorge

Knowing that The van does not have hydro-boost. What power steering pump does the van use. They have the one with and without a reservoir. NAPA has both of them with a price difference of around 57 dollars.

cleveland63b

either one would work, I would get with the reservoir to make life easier otherwise you'll have to swap your old reservoir to the new pump.

Salto_jorge

Can only find remanufactured units at most stores.

The reservoir seems to be a cover pressed onto the pump with fittings attached, two bolts on the back and a connector with a plastic cover for the high pressure hose.
The other two pipes/tubes are for low pressure lines, I image one from the P/S box and the other for the upper fill reservoir.

Looking at it I cannot see how one would put a reservoir onto another pump that came without it.

cleveland63b

from what I remember theres just a big oring and the pump is held to the reservoir with a couple of the fittings, as I said just get the entire assembly. I've only had to swap the pump over a handful of times and I don't see how the cost justified the extra work and possibility of something going wrong