cab pressure- ac/ heat door vents - The 1947 - Present Chevrolet & GMC Truck Message Board Network

vtwinsport · 12-10-2008, 10:24 AM

Does anyone know if the door louvers at the bottom are there for a reason. I'm wondering about sealing them to keep out the cold/hot and make the cab warmer in winter and ac better in summer.
If the cab is anything like a house, I've heard that there has to be a return air vent (in trucks case, a vent to the outside), to cool or heat properly due to air being forced into room (cab), and if the return (vent) is plugged the room (cab) pressure builds up and the heater/ ac literally stops pushing in any more air.
Any thoughts?
thanks.

12-10-2008, 10:24 AM	#1
vtwinsport Registered User Join Date: Nov 2008 Location: edmonton, alberta Posts: 293	cab pressure- ac/ heat door vents Does anyone know if the door louvers at the bottom are there for a reason. I'm wondering about sealing them to keep out the cold/hot and make the cab warmer in winter and ac better in summer. If the cab is anything like a house, I've heard that there has to be a return air vent (in trucks case, a vent to the outside), to cool or heat properly due to air being forced into room (cab), and if the return (vent) is plugged the room (cab) pressure builds up and the heater/ ac literally stops pushing in any more air. Any thoughts? thanks. __________________ 76 Silverado, 2wd, long box, 350/th350, 3.42 posi, edelbrock performer 64cc heads, edelbrock 1405, 2101 intake, Hedman Headers, Comp Cam XE262 http://beerbreadbike.wordpress.com/ Last edited by vtwinsport; 12-10-2008 at 07:26 PM.

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