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Global Mod,
Mod | | | Forums66 Topics128,088 Posts1,056,381 Members48,442 | | 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: Mar 2005 Posts: 627 'Bolter | | 'Bolter Joined: Mar 2005 Posts: 627 | If you have replaced the heater hoses and connected them to the incorrect ports on your firewall mounted valve, this is the problem. The valve only allows proper flow in one direction.
Please let us know what fixes it.
Mike
Mike Barnes
1950 GMC 1-ton pickup
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