Do I have Steering Pump w/ Hydroboost?

[tophat36]

I’m going to replace this power steering pump, but I need to understand if I have a hydro-boost version. How do I tell and what is the difference, or purpose I guess? Learning as I go, thanks.

1980 C2500 Sierra Classic
Camper Special
HD chassis

 

[Snoots]

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Hydroboost. Anything else is vacuum boost.

 

[tophat36]

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Hydroboost. Anything else is vacuum boost.

Thank you! Can you explain what I’m looking at and what part of that image indicates that?

 

[HotWheelsBurban]

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Hydroboost. Anything else is vacuum boost.

HB has a booster unit that looks pretty much like this photo. OBS and NBS trucks are fairly similar looking; I've had an '06 with HB and my '97 crew cab 3500 has it too.
Vacuum booster looks like a big metal drum between the master cylinder and the firewall. Usually cadmium plated so it looks gold ish, and about a foot in diameter and 3 to 4 inches thick. And it'll have a big vacuum line coming from the intake manifold to it, with a plastic check valve at the booster end of the line.
Most of the gas 1/2 and 3/4 ton trucks had vacuum boost. One tons and diesels got HB, then in the NBS trucks the LS platform ones got HB too.

 

[AuroraGirl]

You could get a late 70s maybe early 80s square, mostly C10, with power brakes, a diesel, and manual steering.

I want to see a factory setup some day.

My 05 2500hd has good HB and PS