another GMC heater question

[spurgeon]

Here's a pic of the heater. No Ranco valve, and what's the thingy upper left that looks like some sort of blower? I haven't seen one before...

 

[vwnate1]

Heater

The Ranco valve is on the firewall , not under the dash are they worth anything ? I'm pretty sure I have a 100 % complete one for an AD including the knob & correct screws etc. , I no longer need it , should I rebuild it and sell it ? .

That other thing , is a defroster booster blower , not common even Down East where I'm from .

I'd keep it and run it off a rheostat so you can really adjust the air flow .
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[spurgeon]

Heater

Wouldn't it be more correct to say they are on the firewall under the dash?

This truck doesn't seem to have one, but that's easy to change...

 

[vwnate1]

Ranco Valve

I think you're correct .