Express, Savana & G-Series Vans Offered in both a full size van, or a large box truck, the Express is the modern GM workhorse.

Chevrolet Express
Platform: GMT Van

Vacuum diagram

Thread Tools
 
Search this Thread
 
Old May 2nd, 2021, 5:57 PM
  #11  
Super Moderator
 
mountainmanjoe's Avatar
 
Join Date: Feb 2017
Posts: 6,171
Received 664 Likes on 602 Posts
Default

the yellow thing at the 3-way is the check-valve.

One hose should go to the tank. The 2nd should go through the firewall to the cabin. And the 3rd is the source, from the engine intake manifold.
Old May 5th, 2021, 2:32 PM
  #12  
CF Beginner
Thread Starter
 
Sv4.3's Avatar
 
Join Date: Apr 2021
Location: Michigan
Posts: 7
Likes: 0
Received 0 Likes on 0 Posts
Default

Ok awesome. Where does the check valve go and where does it face?
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
1986ChevG10
S-10 & Blazer
0
February 12th, 2016 5:43 PM
vmc12
Silverado, Sierra & Fullsize Pick-ups
1
April 26th, 2011 9:26 PM
Tommyj
S-10 & Blazer
1
April 6th, 2010 11:17 AM
bperu224
Tahoe & Suburban
2
July 26th, 2009 6:02 PM
1986c10
General Tech
1
April 17th, 2008 8:55 PM



Quick Reply: Vacuum diagram



All times are GMT -5. The time now is 2:46 AM.