GM Truck Club
Founded in 2004 ~ We're the #1 Chevy Truck & SUV Forum.
Silverado & Sierra | Tahoe & Yukon | Suburban & Yukon XL | SUV & CROSSOVER
Results 1 to 2 of 2
  1. #1

    Default 1999 GMC SIERRA, heater making making noises in dash

    Hello, I have a 99 gmc sierra ext cab and just the other day it started making noises coming from inside the dash and the heat and air temp controller like stopped working. Even with the heating and air switch off truck running you can hear something moving
    back and forth it sounds like some door or something. Does anyone have any ideas of how to fix this problem.

  2. #2


    Did you find out what was wrong? I had a problem with my Heat/AC that had a similar symptom (noise under the dash), but I'm not sure if it was the same as yours. If you fixed it, you should tell us what you did!!

Similar Threads

  1. 1999 gmc sierra heater making noises in dash
    By tmaccc12 in forum General Chevy & GM Tech Questions
    Replies: 4
    Last: 11-29-2010, 01:31 PM
  2. Subwoofer making weird noises?
    By zachmilz in forum Audio, Video & Gadget Tech
    Replies: 26
    Last: 10-05-2010, 04:31 AM
  3. '09 2500HD with Lift Kit Making Crazy Squeaky Noises
    By jakedajewel in forum Lifted & Offroad Suspension
    Replies: 7
    Last: 09-17-2010, 01:12 PM
  4. Replies: 0
    Last: 02-02-2010, 02:50 AM
  5. 350 making noises and no power
    By ryan schuler in forum General Chevy & GM Tech Questions
    Replies: 0
    Last: 02-25-2009, 04:12 PM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts