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Q: power steering and power brakes on 2004 Chevrolet Suburban 2500

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on my 2004 chevy suburban 2500 the power steering quit working at the same time the power brakes quit working is this the pump because if my hydroboost went out i should still have power steering right
(1) Answer
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Hydroboost utilizes power steering pressure to assist the brakes. Therefore, if the power steering system and the power brake system are both failing, the power steering pump is the best first place to look.
I have blown out 2 pumps to realize that I need a new hydro boost unit. They list them specific for use with JH2, JH5, JH8, AND so on. How do I tell which one is mine? 04 suburban 2500 4x4 6.0l.