Hydroboost or vacuum booster power steering pump on 1993 gmc sierra?

[sniperlif3]

I have a 1993 gmc sierra that is having some power steering pump problems so i am going to replace it. I looked at autozone and they offer two different types which are:
Hydroboost
http://www.autozone.com/autozone/parts/Duralast-Power-Steering-Pump/1993-GMC-C1500-1-2ton-P-U-2WD/_/N-izrl7Z8oxk0?counter=1&filterByKeyWord=power+steering+pump&fromString=search&itemIdentifier=10662_0_2558_3370


Vacuum Booster
http://www.autozone.com/autozone/parts/Duralast-Power-Steering-Pump/1993-GMC-C1500-1-2ton-P-U-2WD/_/N-izrl7Z8oxk0?counter=2&filterByKeyWord=power+steering+pump&fromString=search&itemIdentifier=10661_0_2558_3386


What is the difference and which one do i have?

 

[Molson02536]

I have a 1993 gmc sierra that is having some power steering pump problems so i am going to replace it. I looked at autozone and they offer two different types which are:
Hydroboost
http://www.autozone.com/autozone/pa...tring=search&itemIdentifier=10662_0_2558_3370


Vacuum Booster
http://www.autozone.com/autozone/pa...tring=search&itemIdentifier=10661_0_2558_3386


What is the difference and which one do i have?

There is no "vacuum operating power steering pump". There is however a brake booster system powered from your power steering pump and it is called Hydro Boost. If your truck is equipped with hydro boost, you will see a series of p/s hoses connected to the hydro boost unit behind your master cylinder. If you have a traditional vacuum booster, you will be able to see a large round booster mounted behind the master cylinder with a vacuum line connected to it from the intake.

Hydro boost
http://image.off-roadweb.com/f/8325083/0606or_15_z+1974_ford_bronco+brake_booster.jpg

Vacuum
http://www.trustmymechanic.com/parts_gallery/brake_booster.jpg


Good luck and keep us posted.