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Click on image for the lowdown. 
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| | | Forums66 Topics128,090 Posts1,056,015 Members48,430 | | 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!
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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: May 2005 Posts: 14 Apprentice | | Apprentice Joined: May 2005 Posts: 14 | I have two of these vacuum assist pumps. One is a 12 volt model (used) and the other is a 6 volt model(new in box) They are made by Trico and I see them every once in a while on eBay. You put this in line with the vacuum going to your wipers or other vacuum accessories. When vacuum is low at high RPM's you flip the switch and the pump supplies additional vacuum to your accessories. | | |
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