From: michael.trew@att.net   
      
   On 8/21/2023 11:34 AM, Snag wrote:   
   > We're working on my neighbor's 1995 Chevy truck , the heater/ac control   
   > module is shot . His truck doesn't have rear window defogger , the only   
   > available new control is only available with the button for rear defog   
   > ... I'm wondering if that unit just has an extra pin or two in the   
   > connector , and if it will swap into his truck that doesn't have that   
   > option . Anybody know ?   
      
   I would venture to guess that it would work.  Chevy probably wanted to   
   make it simple off the line.  Sometimes the rear window defrost in   
   certain cars was a dealer installed option.  Hope it works out.   
      
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