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belt screeching sound with the heater on

Discussion in 'Chevy Trucks' started by Metz, Feb 26, 2008.

  1. Metz

    Metz Member
    Messages: 60

    i have an '02 gmc 1500. i have been having this problem for 2 years now. this only happens when the plow is hooked up. when i'm driving, (no particular speed or distance), and i put the heater or defrost on, after a few minutes it will make a terrible screeching noise. i will immediately shut the heater off, the noise stops. i turn it back on and after some time it will do it again. any ideas?
  2. Indy

    Indy Senior Member
    Messages: 704

    ...not sure but it might be the bearing in your fan motor and the heat fluxuation may cause it to act up (most trucks run hotter with a plow on)

    Just my .02, good luck:salute:
  3. Sydenstricker Landscaping

    Sydenstricker Landscaping PlowSite Veteran
    Messages: 3,882

    Sounds like your blower motor is going to take a dump here shortly. They arent too bad to replace though, done a few in my day, LOL.
  4. Metz

    Metz Member
    Messages: 60

    thanks for the quick responses
  5. ABES

    ABES PlowSite.com Addict
    from MN
    Messages: 1,322

    My blower motor squeals really bad too when its cold out i suppose i will have to replace that soon.
  6. Mark13

    Mark13 PlowSite Fanatic
    Messages: 5,796

    Mine does it also, happens off and on. Its been doing it for 2 years so one of these times its not going to turn on or work right.
  7. Spitz

    Spitz Senior Member
    Messages: 192

    Also keep in mind the a/c compressor runs on certain heater settings to dry the air coming into the cabin.. You'll have to be sure its the blower motor squealing and not an actual belt squeal coming from the serpentine belt.
  8. yancy

    yancy Senior Member
    Messages: 124

    I just had a similar problem found out it was the tension pulley behind the serpentine belt that runs the ac pump about a $30 fix and about 2 hr time
  9. Monte

    Monte Junior Member
    Messages: 19

    I am having the same type of problem, but is yours a constant noise. The noise in my 2001 3500 dually only lasts for about a second or two, but it happens quite often throughout the night when plowing. I brought mine to the dealer, but they could not get the noise to occur. I really want to get it fixed.