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Click on image for the lowdown. 
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| | | Forums66 Topics128,126 Posts1,056,353 Members48,441 | | Most Online14,466
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!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
| | THANKS!
For helping keep this great
old truck web site
on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
| | | | Joined: Nov 2010 Posts: 1,159 Shop Shark | | Shop Shark Joined: Nov 2010 Posts: 1,159 | http://www.autozone.com/repairguide...AMS/VACUUM-DIAGRAMS/_/P-0900c1528007dbe6 Best I could find! searched for 2 hours! A lot of wiring diagrams,Not much on Vacuum!! Same thing with my T.F. '55 Chevy 2-ton! I bought a Truck Shop Manual,and there was nothing in it for the hydrovac or the 2-speed vacuum plumbing! The "brake" side of the hydrovac was covered,but Not the vacuum routing! The only "problem" I had was when I attached my 2-speed lines.I had them switched. Button "Up" is "Hi","Down" is "Lo". I switched the lines at the diaphragm,and it worked as it should. | | |
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