How can I close the blend door, when driving in the winter season I notice that when I turn down the blower motor it gets extremely cold.

[Maniac]

Hi everyone. I'm new on this site. I currently own a '87 Chevy SWB, with a fuel injected 350 (TBI), a '83 GMC, SWB with a transplanted 350, a '86 single cab 1 ton dually with a 454, and a '86 SWB parts truck.

 

[squaredeal91]

Welcome on here from Oregon

 

[squaredeal91]

@SirRobyn0 had a good write up on changing heater core and maybe that info will help. And Is yours an a/c or non style air box to better answer your question.

 

[SirRobyn0]

@squaredeal91 Thanks for bringing me in to this thread. I'm not sure that I can specifically answer @Maniac question but the heater core thread is here:
>>>> https://www.gmsquarebody.com/threads/heater-core-how-to.40744/ <<<<<
If you flip though my posts on that thread you can see the various blend doors (there are lots of pictures) and how they are set up.

 

[Mr Clean]

 

[WFO]

Welcome from the Texas Panhandle.