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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Feb 2005 Posts: 199 Wrench Fetcher | | Wrench Fetcher Joined: Feb 2005 Posts: 199 | There is a Tech Article on rebuilding the hydro vac unit in the tech page.
The article deals with single vac units but I think the approach will be similar for the two stage units.
The parts are available or as has been suggested you may want to opt for a rebuilt unit.
Also the shop manual has instructions for rebuilding with excellent parts breakdown.
Hobert
"The Lord is my shepherd"
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