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Click on image for the lowdown. 
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| | | Forums66 Topics128,126 Posts1,056,354 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: Jan 2013 Posts: 1,384 Shop Shark | | Shop Shark Joined: Jan 2013 Posts: 1,384 | Sounds like restricted cooling flow.
Possibilities:
Partially blocked radiator core
Blocked cooling chambers in block and/or head (rust and sediment)
intake hose collapsing or internal separation
wrong head gasket (blocking passages)
faulty thermostst
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