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Heater Box Hoses - Which is Inlet/Outlet?

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Old 01-18-2011, 07:37 PM
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Default Heater Box Hoses - Which is Inlet/Outlet?

on my '02 TA - I can't remember which hose is the inlet to the heater box and which one is the outlet

One hose is ~3/4" ID
Other is ~ 5/8" ID
Old 01-18-2011, 07:43 PM
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Feed is 5/8
Return 3/4

Same for almost all GM vehicles




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