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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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| | | | Joined: Dec 2019 Posts: 5 New Guy | | New Guy Joined: Dec 2019 Posts: 5 | Anyone know if the upper heater hose goes into the right heater core tube or the left on the firewall? Nothing in the manual and some conflicting pics online | | | | | Joined: May 2017 Posts: 100 'Bolter | | 'Bolter Joined: May 2017 Posts: 100 | It will work either way you hook up,no right or wrong way. Water in water out .I always try to put flow in be-hide the switch valve that lets antifreeze into the heater core.
This way keeps pressure out of the core assembly. heater cores are old or new but I don't like to add pressure if I can help it.
!956 Gmc Napco 4x4 Factory line built .
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