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73-87 Chevy _ GMC Trucks => Interior & Equipment => Heating, Ventilation & Air Conditioning (HVAC) => Topic started by: MY1978 on March 11, 2021, 08:49:43 am

Title: Duct part
Post by: MY1978 on March 11, 2021, 08:49:43 am

Hello all,

I am in search for a part.  I have not been able to find the "foot cooler" that is part of the left distribution duct by any search on internet or Ebay.  GM manual lists it, but I am unable to find it for sale anywhere.  Any ideas?  My next check is my favorite bone yard. 

Title: Re: Duct part
Post by: ehjorten on March 11, 2021, 09:21:50 am

I bought that assembly from the company that shall not be named, but it was a few years ago. Looking now, I don't see it. Perhaps call them an ask?

Title: Re: Duct part
Post by: MY1978 on March 11, 2021, 10:55:30 am

okay thanks, but what company should I call?  That picture is from the 1978 Chevrolet service manual.

Title: Re: Duct part
Post by: ehjorten on March 11, 2021, 03:49:59 pm

Can't say the name here or it will get deleted. I looked at all of the parts suppliers that I know for our trucks along with this site's online store and I cannot find it now. It was available at one point. I got one from a place that has a three letter acronym followed by "truck". You might try EBay or look to local recyclers.

I will say this...the diverter doesn't actually work very well. I have rebuilt the HVAC units in both of my '77 K20 and '91 V3500 and it doesn't actually blow much air to the driver's feet regardless of fan setting.

Title: Duct part
Post by: blazer74 on March 11, 2021, 10:59:13 pm

Search 3906004 on EBay. Couple of used assy.
Also new pieces to put one together except for the retainer(spring) and screw.

3906004.    Adapter
3906003.    Felt
3906002.    Deflector
3146637.     Retainer
#8-18x3/8.  Screw.

Title: Re: Duct part
Post by: MY1978 on March 12, 2021, 02:05:58 pm

Wow!!!  Thanks.  I have looked and looked on Ebay and didn't find anything.