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heater fan relay

Discussion in 'General Chevy & GM Tech Questions' started by soatway, Oct 5, 2008.

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  1. soatway

    soatway New Member

    I have a 94 k2500 gmc suburban with the 454 and a/c. I am having a problem with my heater fan motor. The motor works fine but only on low or high. There are two medium settings where nothing happens anymore. As i go though the differnt positions i can hear a soft clicking coming from what appears to be four relays sitting on top of the heater ac unit under the dash. I have the glove box out. How do i isolate the relay? Are they all the same part? Can anyone help me? I have read the available posts and feel like I am close to a solution.
  2. collinsperformance

    collinsperformance New Member 100 Posts

    i bet it is the resistor pack or switch that is the issue. the resistors control what speed the motro goes into...........mike
  3. dwill3015

    dwill3015 New Member 1000 Posts 100 Posts

    Check THIS THREAD out and it should give you some good info.
  4. unplugged

    unplugged New Member 1000 Posts 100 Posts

    Bravo. Not the most complete body of data, but very, very good. Thanks!:rofl:
  5. soatway

    soatway New Member

    The resistor pack sounds like what was calling the relays. I work at a gm store so will check it out . Thanks/

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