Heat/AC air volume troubles

Discussion in 'General Chevy & GM Tech Questions' started by GElwell, May 22, 2010.

  1. GElwell

    GElwell New Member

    Thanks for reading and hopefully someone has an avenue I can persue:

    I have a 1993 Silverado recently purchased to pull my camper and I notice the air blows at less than optimal. It seems like I'm on low speed even though I can tell it's on high. Is there somewhere I can go in the heating system to look for a blockage? It's really noticable when in fefrost mode. I'm very familiar with taking apart dashes due to being a professional car stereo installer but I really do not want to take the entire dash apart if it's not necessary. Thanks in advance for any suggestions.
  2. murdog94

    murdog94 Epic Member 5+ Years 5000 Posts

    Pull out your heater fan.. you will not need to pull the dash to get it. it is mounted in the foot well.. The motors get old and weak and dont push as hard. I swaped mine out when it would make noise and hardly move the air and now it works great. These trucks are notorious for the HVAC fan not working properly after a time.
  3. unplugged

    unplugged Epic Member 5+ Years 1000 Posts

    My 93 is similar to yours. Search the forums. I have a post with pics for the fan motor replacement. And I have another post for the blower relays. When I did both I found it necessary to remove the glove box for easy access. I'm not sure your problem is the fan or blower relays. Check the wires for the relays. The circuit gets very hot and burns the leads.

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